Publications / Patents

List of Publications (in reverse chronological order)

google scholar: https://scholar.google.co.in/citations?hl=en&user=L_SrFzcAAAAJ&view_op=list_works&sortby=pubdate

Patent Filed:

1. Sivakumar Vaidyanathan, Jaipal G, S R Nayak, Sabita Patel “Near UV-deep blue emitters and uses thereof in organic electronics” Indian patent filed.

2. Sivakumar Vaidyanathan, Md Intekhab Alam, Sabita Patel, “Yellow TADF emitters and uses thereof in organic electronics”, Indian patent filed.

Submitted papers:

1.     Alam, Md Intekhab; Nagar, Mangey Ram; Jou, Jwo-Huei; Vaidyanathan, Sivakumar, "Tailoring the structural rigidity utilizing lock/unlock donor strategy for highly efficient Solution processed Blue and Green TADF OLEDs" – submitted

2.     Md Intekhab Alam, Sivakumar Vaidyanathan, "Enhancing ultra-long pure organic room temperature phosphorescence by simple aromatic carbonyl: combined experimental and theoretical investigations"- Advanced Optical Materials, under revision.

3.     Kasturi Singh, P. Pradhan, Savita Priya, S. Mund and Sivakumar Vaidyanathan*, “Recent progress in Trivalent Europium (Eu3+) based Inorganic phosphors for solid-state lightings – An Overview” – under revision.

4.     Rachna Devi, K. Singh, S. Mund and Sivakumar Vaidyanathan*, "Multifunctional molecular Europium complexes for light emitting didoes and Vapoluminescence sensor (reversible on/off emission switching)", under revision.  

5.     Sibani Mund, K. Singh, Deepak, Anju Babu, U. Subuddhi and Sivakumar Vaidyanathan*, "Unveiling the versatility of Coumarin Integrated with Phenanthroline/Thiabendazole based EuIII complexes for smart LEDs, Vapoluminescence, and Bioimaging applications”, Inorganic Chemistry Frontiers, - Submitted

6.     Sibani Mund, U. Subuddhi and Sivakumar Vaidyanathan*, "Highly Efficient EuIII-molecular complex as a red phosphor for two/three component high performance white light emitting diodes with high color purity and CRI", Submitted

7.     Md Inekab Alam, Mangey Ram Nagar, Jwo-Huei Jou and Sivakumar Vaidyanathan*, "Structurally Modified Shining Butterfly Wings Enables Yellow TADF Emitter/Sensitizers for Solution processed OLEDs Exceeding a 31% EQE" Submitted

8.     Sibani Mund, Rachna Devi, K. Singh, U. Subuddhi and Sivakumar Vaidyanathan*, "Molecular Siblings modulated Bright White/Red light emissive Europium Complex and their Multifunctional Applications", Submitted.

9. A. B. Kajjam, K. Singh and V. Sivakumar*, Excitation-dependent organic down-converting Imidazo-pyridine based materials for WLEDs: Combined experimental and theoretical investigation, - Journal of Information Display, under revision.

10.  Jaipal Devesing Girase, Mangey Ram Nagar, Shahnawaz, Jwo-Huei Jou, and Sivakumar Vaidyanathan* “Solution-processed imidazole-triphenylamine based fluorophores exceeding theoretical limit (>5%) for deep-blue organic light-emitting diodes: Combined theoretical and experimental study” submitted.

11.  Rajamouli Boddula, Kasturi Singh, and Sivakumar Vaidyanathan*, Designing of organic chromophores and study their excited photophysical properties for EuIII complexes – a theoretical approach, submitted.

12. K. Singh, R. Boddula, A. B Kajjam, M. J. Allen, Sivakumar Vaidyanathan* Effect of N-Conjugation in Imidazo-Bipyridyl Ancillary Ligands and Their Energy-Transfer Impact on Eu(III)–Beta-Diketonate Complexes for White-Light-Emitting Diodes. Submitted.

13.  Priyansha Sharma, Jaya Madda and Sivakumar Vaidyanathan, Narrow band dazzling red emitting (LiCaLa(MoO4)3:Eu3+) phosphor with scheelite structure for Hybrid White LEDs and LiCaLa(MoO4)3:Sm3+, Eu3+ Based Deep-Red LEDs for Plant Growth Applications, Submitted   

In Refereed International Journals: 

1. Sibani Mund, K. Singh and Sivakumar Vaidyanathan*, " High-performance white light-emitting diodes based on Efficient Trivalent Europium molecular complex", J. Mater. Chem. C, 2024, https://doi.org/10.1039/D4TC03087G, (Citation – 0), Impact factor: 5.700 Q1

2.  Md Inekab Alam, Mangey Ram Nagar, Jwo-Huei Jou and Sivakumar Vaidyanathan*, "Twisted Acceptor Core Molecular Design with Phenoxazine and Phenothiazine Donors Enabled Yellow TADF Emitter/Sensitizers for Long-lifetime Solution-processed OLEDs Exceeding a 31% EQE". Chem. Mater. 2024, 36, 18, 8649–8662, Dedicated to Professor. U. V. Varadaraju on the occasion of her 70th Birthday, (Invited article, part of The Chemical Research Society of India (CRSI) celebrated its 25th anniversary in 2024), (Citation – 0), Impact factor: 7.2 Q1.

3.  Sibani Mund, K. Singh, Deepak, Anju Babu, U. Subuddhi and Sivakumar Vaidyanathan*, "Unveiling the versatility of Coumarin Integrated with Phenanthroline/Thiabendazole based EuIII complexes for smart LEDs, Vapoluminescence, and Bioimaging applications”, - ACS Applied Bio Materials, DOI: 10.1021/acsabm.4c00839, (Invited article, part of The Chemical Research Society of India (CRSI) celebrated its 25th anniversary in 2024), Dedicated to Professor A. K. Mishra on the occasion of her 65th Birthday, (Citation – 0), Impact factor: 4.6 Q1

4.  S. Rana, Sivakumar Vaidyanthan* and S. Patel, Aggregation Induced Emission (AIE) based Donor-π-acceptor Fluorophores: An approach to fabricate acidochromic sensors and white light emitting diodes, DOI: 10.1039/D4TC02617A, J. Mater. Chem. C, 2024,12, 14148-14164, (Citation – 0), Impact factor: 5.700 Q1

5. Diksha Thakur, Sivakumar Vaidyanathan*, Chirality Inducing Units in Organic TADF Molecules: A Way to Circularly Polarized Luminescence, J. Mater. Chem. C, 2024, 12, 13168-13229, DOI: 10.1039/D4TC01923G (Review Article), (Citation – 0), Impact factor: 5.700 Q1

6. Alam, Md Intekhab; Nagar, Mangey Ram; D. Barman, P. K. Iyer, Jou, Jwo-Huei; Vaidyanathan, Sivakumar*, "Tailoring the structural rigidity utilizing lock/unlock donor strategy for highly efficient Solution processed Blue and Green HLCT OLEDs" – J. Mater. Chem. C, 2024, 12, 13585-13595, https://doi.org/10.1039/D4TC00417E, (Citation – 0), Impact factor: 5.700 Q1

7. Swetha Maredi, Sibani Mund, Sandhya Rani Nayak, Samatha Devineni, Subrahmanyam C, Vaidyanathan Sivakumar*, White Light Emissive Eu(III) Complexes through Ligand Engineering and their Applications in Cool Near Ultraviolet White Light Emitting Diodes and Thermometer, Chemphyschem, 2024, doi: 10.1002/cphc.202400320, Invited article. (Citation – 1), Impact factor: 4.6 Q1, Dedicated to Professor Archita Patnaik on the occasion of her 65th Birthday

8. 8 Bhabana Priyadarshini Debata, Jwo-Huei Jou, Sabita Patel and Sivakumar Vaidyanathan*, The design and synthesis of 1-phenylimidazo[1,5-a]pyridine – anthracene based  fluorophore for greenish-yellow organic light emitting diode and warm white LED, - Journal of Information Display, 2024, DOI:10.1080/15980316.2024.2304869 (Citation – 0), Impact factor: 3.700 Q1

9.  Snigdhamayee Rana, Sandhya Rani Nayak, Sabita Patel and Sivakumar Vaidyanathan, “Efficiency Boost in Non-Doped Blue Organic Light Emitting Diodes: Harnessing Aggregation-Induced Emission - A Comprehensive Review” - J. Mater. Chem. C, 2024, 12, 765-818, DOI: 10.1039/D3TC03449F, (Citation – 0), Impact factor: 8.067, Q1

10. Sandeep Kumawat, Sunidhi Singh, Tharun Bhatt, Anjali Maurya, Sivakumar Vaidyanathan, Kishore Natte and Jagadeesh Rajenahally, Valorization of Bio-Renewable Glycerol by Catalytic Amination Reactions, (Critical Review) - Green Chem., 2024, 26, 3021-3038, DOI: 10.1039/D3GC02699J (Citation – 0), Impact factor: 9.8, Q1

11. Gobinath Marappan, Abdul Kaium Mia, Kishore Puspharaj, Sivakumar Vaidyanathan, Yoshiyuki Kawazoe, Yuvaraj Sivalingam, Velappa Jayaraman Surya, “Response to VOCs Stimuli by Triphenylamine Derivatives Functionalized Zinc Oxide Nanorods: A Promising Material for Food Freshness Monitoring” - Surfaces and Interfaces., 2024, 103648 DOI: doi.org/10.1016/j.surfin.2023.103648, (Citation – 1), Impact factor: 6.4, Q1

12. Priyansha Sharma, Jaya Prakash Madda and Sivakumar Vaidyanathan*, “Narrow band dazzling red emitting (LiCaLa(MoO4)3:Eu3+) phosphor with scheelite structure for Hybrid White LEDs and LiCaLa(MoO4)3:Sm3+, Eu3+ Based Deep-Red LEDs for Plant Growth Applications” - Dalton Trans., 2023, 52, 15043-15056, DOI: 10.1039/D3DT02716C, (Citation – 2), Impact factor: 4.569 Q1

13. Kasturi Singh, P. Pradhan, Savita Priya, S. Mund and Sivakumar Vaidyanathan*, “Recent progress in Trivalent Europium (Eu3+) based Inorganic phosphors for solid-state lightings – An Overview” – Dalton Trans., 2023, 52, 13027-13057, DOI: 10.1039/D3DT00303E  (Citation – 4), Impact Factor: 4.569 (Invited Perspective article). Q1

14. Jaipal Devesing Girase, S Singh, BP Debata, SR Nayak, Mangey Ram Nagar, Jwo-Huei Jou, S. Patel and Sivakumar Vaidyanathan* “Structural Engineering of Deep-Blue Emitters (Imidazoles Integrated with Triphenylamine) Leads to EQE> 6% and High Color Purity (CIEy∼ 0.09) for Solution-Processed OLEDs” - J. Phys. Chem. C, 2023, 127, 33, 16623–16635 DOI: org/10.1021/acs.jpcc.3c03058. (Citation – 1), Impact factor: 4.177 Q2

15. Sivakumar Vaidyanathan, “Recent Progress on Lanthanide-based long persistent phosphors: An Overview” – 2023, Journal of Materials Chemistry C, Accepted, DOI: 10.1039/D2TC05243A

16.  Sandhya Rani Nayak, Luke The, Md Intekhab Alam, Mangey Ram Nagar, Jwo-Huei Jou, Sabita Patel, Sivakumar Vaidyanathan, "Molecular Modulation by Sigma Conjugated Spacer Enables Efficient Ultraviolet/Deep-blue Emissive Organic Light-Emitting Diodes", The Journal of Physical Chemistry C, 2023, Accepted for publicatons, https://doi.org/10.1021/acs.jpcc.2c08679.

17. Sandhya Rani Nayak, Sabita Patel and Sivakumar Vaidyanathan*, “Imidazole-based fluorescent probes: Concomitant effects of N1 substitution and lone pair on selective recognition of Picric Acid”, New Journal of Chemistry, 2023, 47, 3524 - 3534 DOI: 10.1039/D2NJ06079E

18. Sandhya Rani Nayak, Shahnawaz, Iram Siddique, Jwo-Huei Jou, sabita Patel, and Sivakumar Vaidyanathan*, Multifunctional 4,5-Diphenyl-1H-imidazole-Based Luminogens as Near UV/Deep Blue Emitters/Hosts for Organic Light-Emitting Diodes and Selective Picric Acid Detection” J. Phys. Chem. C 2023, 127, 1, 499–515 (Published as part of The Journal of Physical Chemistry virtual special issue “Early-Career and Emerging Researchers in Physical Chemistry Volume 2)

19.  Sujith Sudheendran Swyam prabha, Kiran Kishore Kesavan, Iram Siddiqui Dovydas Blazevicius, Jayakumar Jayachandran, Marius Eidimtas, Sandhya Rani Nayak, Mangey Ram Nagar, Rohit Ashok Kumar Yadav GintareKrucaite, Sivakumar Vaidyanathan, Saulius Grigalevicius, Jwo-Huei Jou, Novel carbazole host materials for solution processed TADF Organic Light Emitting Diodes, Dyes and Pigments, 208, 2022, 110821, https://doi.org/10.1016/j.dyepig.2022.110821

20. Priyadarshini Pradhan, Kasturi Singh, P. Saradhi Maram and Sivakumar Vaidyanathan*, “Novel oxide based red emitting phosphors and their versatile applications: Synthesis, Structure, and Luminescence Properties”, ACS Applied optical materials, 2022, https://doi.org/10.1021/acsaom.2c00022

21. Sandhya Rani Nayak, Iram Siddique, Shahnawaz, Jwo-Huei Jou, and Sivakumar Vaidyanathan*, Diphenyl-imidazole based fluorophores for explosive chemosensors and serves as efficient host materials for green Phosphorescent Organic Light Emitting Diodes” ACS Applied optical materials, 2022, https://doi.org/10.1021/acsaom.2c00012.

22. Girase , Jaipal Devesing ; Kajjam, Aravind; Dubey, Deepak; Kishore Kesavan, Kiran; Jou, Jwo-Huei; Vaidyanathan, Sivakumar*, “Unipolar 1-phenylimidazo[1,5-a]pyridine: A new class of ultra-bright sky blue emitters for solution-processed organic light emitting diodes” New Journal of Chemistry, 2022, DOI:10.1039/D2NJ01938H, Advanced Article (choosen for back cover).

23. Jaipal Devesing Girase, Mangey Ram Nagar, Shahnawaz, A. Choudhry, Jwo-Huei Jou and Sivakumar Vaidyanathan*, Highly Efficient Multifunctional luminogens for Near UV/Deep Blue (CIEy ~0.02) and Hybrid White OLEDs (CIE~0.33, 0.37) with Superior Color Stability – ACS Appl. Electron. Mater. 2022, 4, 9, 4368–4382.

24. Jaipal Devesing Girase, Shahnawaz, Jwo-Huei Jou, Sabita Patel and Sivakumar Vaidyanathan*, Solution-processed deep-blue fluorophores based on phenanthroimidazole integrated with benzimidazole with HLCT character for efficient deep-blue organic light emitting devices” Dyes and Pigments, 2022, https://doi.org/10.1016/j.dyepig.2022.110623.

25. Sibani Mund, K. Singh, M. Panda, B. Biswal, U. Subuddhi and Sivakumar Vaidyanathan*" Thiabendazole: a new class of antenna core structure for multifunctional trivalent organo-europium (EuIII) complexes ", J. Mater. Chem. C, 2022, 10, 10645 – 10659, Advance Article, https://doi.org/10.1039/D2TC01078J

26. Md Inekab Alam, Mangey Ram Nagar, Sandhya Rani Nayak, A. Choudhry, Jwo-Huei Jou and Sivakumar Vaidyanathan*, "Acceptor Interlocked Molecular Design for Solution-Processed Stable Deep-Blue TADF and Hyper Fluorescence Organic LED Enabling High-efficiency", Advanced Optical Materials, 2022, https://doi.org/10.1002/adom.202200376

27. Kasturi Singh, and Sivakumar Vaidyanathan* “Stable and efficient narrow band red emitters with high colour purity for white LEDs and plant growth applications” Dalton Transactions, 2022, DOI: 10.1039/D2DT01042A, (appeared in back cover)

28. Jaipal Devesing Girase, Shahnawaz, Jwo-Huei Jou and Sivakumar Vaidyanathan*, Deep-blue Fluorophores Based on Phenanthroimidazole Integrated with Benzo[d]thiazole: Experimental and Theoretical Investigation”, Chemistryselect, 2022, DOI: 10.1002/slct.202201514

29. Jaipal Devesing Girase, Shahnawaz, Mangey Ram Nagar, Jayakumar J, Jwo-Huei Jou and Sivakumar Vaidyanathan*, New deep blue fluorophores based on benzo[d]thiazole group as acceptor core: Theoretical, Synthesis, Photophysical and Electroluminescent Investigation”, Journal of Luminescence, 248, 118992, 2022.

30. Jaipal Devesing Girase,  Sushmita Mukharjee, Tanwiastha C,  Sabita Patel, Ajay Perumal and Sivakumar Vaidyanathan, “Mild donor-p-mild acceptor (mD-p-mA) benzimidazole based deep blue fluorophores with hybridized local and charge transfer (HLCT) excited states for OLEDs”, Journal of Information Display, 2022, Accepted, https://doi.org/10.1080/15980316.2022.2075042.

31. Sibani Mund, and Sivakumar Vaidyanathan*, "New Isomeric ancillary ligand and their EuIII complexes: A single component white light emissive phosphor and their applications in Red/White smart LEDs, Electronic Noses and Temperature sensing"                 J. Mater. Chem. C, 10 (18), 7201-7215, 2022, doi.org/10.1039/D2TC00664B. (Citation – 0)

32.  Kasturi Singh, Marikumar Rajendran, Rachna Devi and Sivakumar Vaidyanathan* “Narrow band red emitting phosphors with high color purity, trifling thermal and concentration quenching for hybrid white LEDs and Li3Y3BaSr­(MoO4)8 :Sm3+, Eu3+ based deep-red LEDs for plant growth applications” ACS Inorganic Chemistry, DOI: 10.1021/acs.inorgchem.1c02836. (Citation – 1), 2022, 61 (6), 2768- 2782

33. Jaipal Devesing Girase,  Jairam Tagare, Sushmita Mukharjee, Tanwiastha,  Ajay Perumal and Sivakumar Vaidyanathan, “Efficient deep blue (CIE ~0.08) flourophore based on benzimidazole with hybridized local and charge transfer (HLCT) excited state for OLEDs”, - Journal of Information Display,  – 2022, 1-12. https://doi.org/10.1080/15980316.2022.2029592 (Citation – 0)

34.  Priyadarshini Pradhan, Savita Priya, Marikumar Rajendran, Kasturi Singh and Sivakumar Vaidyanathan*, “Efficient and ultra-thermally stable Eu3+ and Sm3+ activated narrow band red/deep red emitting phosphors and their versatile applications”, Dalton Trans., 2022, DOI:https://doi.org/10.1039/D1DT04036G (chosen for back cover page). (Citation – 0), Impact factor: 4.39. 2022, 51 (2) 715-730.

35. Jairam Tagare, A. B. Kajjam, Kasturi Singh, Sabita Patel and Sivakumar Vaidyanathan*, Acenaphthene-Triphenylamine based Derivatives: Synthesis, photophysical and theoretical investigation for organic light emitting diodes, – Materials Advances – 2022, DOI: 10.1039/D1MA00583A.  2022, 3 (1), 399-408. (Citation – 0), From the themed collection: Editor’s Choice: Malika Jeffries-EL

36. R. Marikumar, R Devi, S. Mund, K. Singh and Sivakumar Vaidyanathan*, Energy transfer cooperation between ligands and EuIII ion in molecular europium complexes for vapoluminescence sensor (reversible on/off emission switching) and hybrid white LEDs, J. Mater. Chem. C, DOI: 10.1039/D1TC02363B. (This article is part of the themed collection: Journal of Materials Chemistry C HOT Papers). 2021, 9 (42), 15034-15046. (Citation – 5)

37. Jaipal Devesing Girase, Jairam Tagare, Shahnawaz, Mangey Ram Nagar, Iram Siddique, Jwo-Huei Jou, Sabita Patel and Sivakumar Vaidyanathan*, Deep-blue emitters (CIEy ~0.07) based on phenanthroimidazole: Remarkable substitution effects at the N1 position of imidazole on the excited states and electroluminescence properties” Dyes and Pigments, 2021, https://doi.org/10.1016/j.dyepig.2021.109791. 2021, 196, 109791. (Citation – 1)

38. Jaipal Devesing Girase, Sandhya Rani Nayak, Jairam Tagare, Shahnawaz, Mangey Ram Nagar, Jwo-Huei Jou, and Sivakumar Vaidyanathan* “Solution processed deep-blue (y~0.06) fluorophores based on Triphenylamine-Imidazole (Donor-Acceptor) for OLEDs: Computational and experimental exploration” – Journal of Information Display, – 2021. DOI: 10.1080/15980316.2021.1959429. 2022, 23 (1), 53-67. (Citation – 1).

39. A. B. Kajjam, Kasturi Singh, R. V. Varun Tej, and Sivakumar Vaidyanathan*, Carbazole-Acenaphthene (Donor-Acceptor) based luminophores for picric acid detection: a combined experimental and theoretical study – Materials Advances – accepted for publications, 2021. https://doi.org/10.1039/D1MA00445J (Citation – 1), Impact factor: NA. 2021, 2 (15), 5236- 5247

40. Rachna Devi, R. Marikumar, K. Singh, Raksha Pal, Sivakumar Vaidyanathan*, "Smart luminescent Molecular Europium complexes and their versatile applications"
    J. Mater. Chem. C, 2021, 9 (20), 6618-6633, https://doi.org/10.1039/D1TC01049B, (Citation – 7), Impact factor: 7.059.

41. Jairam Tagare, Rohit Ashok Kumar Yadav, Sujith Sudheendran Swayamprabha, Deepak Kumar Dubey, Jwo-Huei Jou and Sivakumar Vaidyanathan, ‘Solution Processed Deep-blue with CIEy∈ (0.05) and Pure-white CIEx,y∈ (0.34, 0.32) Organic Light-emitting Diodes: Experimental and Theoretical Investigation’ J. Mater. Chem. C, 2021, 9 (14), 4935-4947 https://doi.org/10.1039/D1TC00228G, (Citation – 11), Impact factor: 7.393.

42. 28.  S. Kasturi and Sivakumar Vaidyanathan*, “Novel narrow band red emitters based on mixed metal oxides and their application in hybrid white LEDs, Luminescence, 36 (3), 576-587, 2021. DOI:10.1002/bio.3975 (Citation – 2), Impact factor: 2.464.

43. 29.  S. Kasturi, R. Marikumar, Rachna Devi and Sivakumar Vaidyanathan*, “Narrow band red emitting phosphor with negligible concentration quenching for hybrid white LEDs and plant growth applications" – Dalton Trans., 2020, https://doi.org/ 10.1039/D1DT00449B (chosen for cover page). (Citation – 14), Impact factor: 4.39. 2021, 50 (14), 4986-5000.

44. 30.  Rajamouli Boddula, T. Jairam, Kasturi Singh and Sivakumar Vaidyanathan*, "White light emissive Europium complex and their versatile applications", Mater. Chem. Front., 2021, 5 (7), 3159-3175 https://doi.org/10.1039/D1QM00083G, (Citation – 5), Impact factor: 6.059.

45. 31.  A. B Kajjam, Sivakumar Vaidyanathan*, Acenaphthene-imidazole based red-to-NIR Emissive Homoleptic and Heteroleptic Ir(III) complexes for OLEDs: combined experimental and theoretical approach, Inorganica Chimica Acta, 519, 120268, 2021.  (Citation – 3), Impact factor: 2.375, https://doi.org/10.1016/j.ica.2021.120268

46. 32.  Rachna Devi, R. Boddula, K. Singh, Satendra kumar and Sivakumar Vaidyanathan, New Europium complexes and their use in red light emitting diode and vapoluminescent sensor, Journal of Information Display, 2021, 22 (3), 137-151, DOI: 10.1080/15980316.2021.1879960, 2021. (Citation – 5), Impact factor: 2.913.  .

47. 33.  Jairam Tagare, Rajamouli Boddula, Rohit Ashok Kumar Yadav, Deepak Kumar Dubey, Jwo-Huei Jou, Sabita Patel and Sivakumar Vaidyanathan*, Novel Imidazole-Alkyl Spacer-Carbazole based Fluorophores for Deep-Blue Organic Light Emitting Diodes: Experimental and Theoretical Investigation, Dyes and Pigments, 185, 2021, 108853, DOI: https://doi.org/10.1016/j.dyepig.2020.108853. (Citation – 9), Impact factor: 4.889.

48. 34.  R Devi, K Singh, Sivakumar Vaidyanathan*, Synergy in energy transfer between ligand and EuIII ion in molecular Europium complex: a single-component white light emissive luminogens, Journal of Materials Chemistry C, 2020, 8 (25), 8643-8653, DOI: https://doi.org/10.1039/D0TC01360A. (Citation – 25), Impact factor: 7.393.

49. 35.  Jairam Tagare, Rajamouli Boddula, S. S. Swayamprabha, Deepak Kumar Dubey, Jwo-Huei Jou, Sabita Patel and Sivakumar Vaidyanathan*, “Efficient near ultraviolet emissive (CIEy<0.06) Organic Light-Emitting Diodes based on Phenanthroimidazole-Alkyl spacer-Carbazole fluorophores: Experimental and Theoretical investigation” Journal of Materials Chemistry C, 8(47), 16834-16844, 2020, DOI: 10.1039/D0TC03720F (Citation – 10), Impact factor: 7.393.

50. 36.  R. Marikumar, Kasturi Singh, V. Sivakumar*, A novel Sm3+ activated Li3BaSrLn3(MO4)8 [Ln = La Gd and Y; M = Mo and W] deep red emitting phosphors for plant cultivation and LEDs. Journal of Information Display, 2021, 22 (2), 63-81. DOI: 10.1080/15980316.2020.1831630.  (Citation – 6), Impact factor: 3.70.

51. 37.  Rachna Devi, Rajamouli Boddula, Tagare Jairam, Kajjam Aravind;, Kasturi Singh, Sivakumar Vaidyanathan*, White emissive europium complex with CRI 95%: Butterfly Vs triangle structure, Journal of Materials Chemistry C, 2020, 8 (34), 11715 – 11726, https://doi.org/10.1039/D0TC02724C (This article is part of the themed collection: Journal of Materials Chemistry C HOT Papers). (Citation – 19), Impact factor: 7.393.

52. 38.  R Marikumar, Sivakumar Vaidyanathan, Systematic investigation of Eu3+ activated Na2Ln4(MoO4)7 [Ln = La, Gd and Y] narrow band red emitting phosphors for hybrid white LEDs and plant growth, New Journal of Chemistry, 2020, 44 (35), 14823-14836. DOI: 10.1039/D0NJ03766D (appeared in cover page). (Citation – 24), Impact factor: 3.591.

53. 39.  T. Jairam, N. Verma, K. Tarafder and V. Sivakumar*, "Synthesis, Photophysical and Theoretical Studies of Phenanthroimidazole derivatives for Organic Light Emitting Diodes", Luminescence, 2020, 8 (35), 1338- 1349. https://doi.org/10.1002/bio.3896. (Citation – 3), Impact factor: 2.464.

54. 40.  Jairam Tagare,  D. K. Dubey, R. A. K. Yadav, J. H. Jou and Sivakumar Vaidyanathan*, Triphenylamine-imidazole based luminophores for deep-blue (CIEy≈0.06) organic light emitting diodes: Experimental and theoretical investigation, Materials Advances, 2020, 1 (4), 666-679 DOI: 10.1039/D0MA00007H. (Citation – 14), Impact factor: NA. This article is part of the themed collection: Fluorescent and Luminescent Materials. From the themed collection: Celebrating Materials Science in India

55. 41.  R Marikumar, Sivakumar Vaidyanathan*, Zero-concentration quenching: A Novel Eu3+ based red phosphor with Non-layered crystal structure for white LEDs and NaSrY(MoO4)3:Sm3+ based deep-red LEDs for plant growth, Dalton Trans., 2020, 49 (46), 9239-9253. DOI: https://doi.org/10.1039/D0DT01517B (chosen for cover page and highlighted as a HOT articles). (Citation – 12), Impact factor: 4.39.

56. 42.  R. Marikumar and V. Sivakumar*, "A novel high efficient host-sensitized red emitting (Ba2YV3O11:Eu3+) phosphor for hybrid white LEDs", ChemistrySelect, 2020, 5(17), 5128-5136. (Citation – 7), Impact factor: 2.109. https://doi.org/10.1002/slct.202000601

57. 43.  Rachna Devi and V. Sivakumar*, Narrow band red emitting Europium complexes and their application in smart white LEDs and Vapoluminescent Sensors, Dalton Trans., 2020, 49 (19), 6205-6219, https://doi.org/10.1039/D0DT00519C, (Citation – 29), Impact factor: 4.39 (chosen for cover page and highlighted)

58. 44.  R. Marikumar and V. Sivakumar*, High performance red/deep-red emitting phosphors for white LEDs, New J. Chem., 2020, 44 (14), 5354-5365, https://doi.org/10.1039/D0NJ00086H, (Citation – 16), Impact factor: 3.591

59. 45.  Deepak Kumar Dubey, Gintare Krucaite, Sujith Sudheendran Swayamprabha, Rohit Ashok KumarYadav, DovydasBlazevicius, JairamTagare, Sudam Chavhan, Tsung-ChiaHsueh, Sivakumar Vaidyanathan*, Saulius Grigalevicius, Jwo-Huei Jou, Fluorene based amorphous hole transporting materials for solution processed organic light-emitting diodes, Organic Electronics, 79, (2020), 105633, (Citation – 14), Impact factor: 3.721. https://doi.org/10.1016/j.orgel.2020.105633

60. 46.  Marikumar Rajendran, Satish Kumar Samal, SivakumarVaidyanathan*. A novel self-activated (bluish-green) and Eu3+ doped (red) phosphors for warm white LEDs., Journal of Alloys and Compounds, 815 (2020) 152631. DOI: https://doi.org/10.1016/j.jallcom.2019.152631. (Citation – 43), Impact factor: 5.316.

61. 47.  A. B. Kajjam, D. K. Dubey, R. A. Kumar Yadav, J.-H. Jou, V. Sivakumar*, Tetraphenylimidazole-based luminophores for explosive chemosensors and OLEDs: experimental and theoretical investigation, Materials Today Chemistry, 14 (2019) 1002012. DOI: https://doi.org/10.1016/j.mtchem.2019.100201. (Citation – 3), Impact factor: 8.301.

62. 48.  B. Rajamouli and V. Sivakumar*, “Bi-nuclear luminescent Europium(III) molecular complexes for white light emitting diodes: Experimental and theoretical study”- Inorganica Chimica Acta, 494, 141-153, 2019. (Citation – 10), Impact factor: 2.375. https://doi.org/10.1016/j.ica.2019.05.014

63. 49.  T. Jairam,  D. K. Dubey, J. H. Jou and V. Sivakumar, Near UV/deep blue emissive phenanthroimidazole-alkyl spacer based luminophores for organic light emitting diodes: Experimental and theoretical investigation, ChemistrySelect, 2019, 4 (21), 6458 –6468., (Citation – 5), Impact factor: 2.109, http://dx.doi.org/10.1002/slct.201900383 .  

64. 50.  Marikumar R. and V. Sivakumar*, “New red emitting phosphors NaSrLa(MO4)3: Eu3+ [M = Mo and W] for white LEDs: Synthesis, structural and optical study” Journal of Alloys and Compounds, 2019, 789, 919-931 (Citation – 58), Impact factor: 5.316 https://doi.org/10.1016/j.jallcom.2019.03.141

65. 51.  T. Jairam,  D. K. Dubey, R. A. K. Yadav, J. H. Jou and V. Sivakumar*, Synthesis, photophysical, theoretical and electroluminescence study of triphenylamine-imidazole based blue fluorophores for solution-processed organic light emitting diodes, Dyes and pigments 160, 944-956 2019, (Citation – 27), Impact factor: 4.889, https://doi.org/10.1016/j.dyepig.2018.09.007

66. 52.  T. Jairam and V. Sivakumar*, Recent development of phenanthroimidazole based fluorophores for blue Organic Light Emitting Diodes (OLEDs): An overview – Journal of Materials Chemistry C 6 (38), 10138-10173 – 2018, DOI: 10.1039/C8TC03689F, (Citation – 131), Impact factor: 7.393. Themed Collections - Journal of Materials Chemistry C top 5% most-read Q4 2018

    1. 1.  

67. 53.  T. Jairam,  S. S. Swayamprabha, D. K. Dubey, R. A. K. Yadav, J. H. Jou and V. Sivakumar, Highly twisted Tetra-N-phenylbenzidine-Phenanthroimidazole based derivatives for blue Organic Light Emitting Diodes: Experimental and Theoretical investigation, Organic Electronics, 2018, 62, 419-428, (Citation – 13), Impact factor: 3.721, https://doi.org/10.1016/j.orgel.2018.08.022

    1. 1.  

68. 54.  S. Kasturi, Marikumar. R and Sivakumar V*, “Trivalent Rare- earth activated hexagonal Lanthanum fluoride (LaF3:RE3+ - RE = Tb, Sm, Dy and Tm) Nanocrystals: Synthesis and optical properties”- Luminescence. 2018, (Citation – 14), 2018, 33 (5), 897-906. Impact factor: 2.464, https://doi.org/10.1002/bio.3488

69. 55.  Aravind Babu Kajjam, P Shyam Vinod kumar, V. Subramanian, and V. Sivakumar*, Triphenylamine based yellowish-orange emitting organic dyes (Donor – π – Acceptor) for hybrid WLEDs and OLEDs: synthesis, characterization and theoretical study,   Phys. Chem. Chem. Phys., 20 (6), 4490-4501, 2018 DOI: 10.1039/c7cp08670a, (Citation – 19), Impact factor: 3.676.

70. 56.  Aravind Babu Kajjam, V. Sivakumar*, Tuning the photophysical properties of heteroleptic Ir(III) complexes through ancillary ligand substitution: Experimental and theoretical investigation, Journal of Photochemistry and Photobiology A: Chemistry, 350, 2018, 130-141, DOI.org/10.1016/j.jphotochem.2017.09.054, (Citation 4 ), Impact factor: 4.291.

71. 57.  T. Jairam, Hidayath Ulla, M.N. Satyanarayan, V. Sivakumar*, Efficient non-doped bluish-green organic light emitting devices based on N1 functionalized star-shaped phenanthroimidazole fluorophores, Journal of Photochemistry and Photobiology A: Chemistry, 353, 2018, 53-64, DOI.org/10.1016/j.jphotochem.2017.11.001, 2018, 353, 53-64.  (Citation – 17), Impact factor: 4.291

72. 58.  T. Jairam, Hidayath Ulla, M.N. Satyanarayan, V. Sivakumar*, Synthesis, Photophysical and Electroluminescence Studies of New Triphenylamine - phenanthroimidazole Based materials for Organic Light Emitting Diodes. Journal of Luminescence, 2018, 194, 600-609.  DOI; 10.1016/j.jlumin.2017.09.020, (Citation 24), Impact factor: 0.625

73. 59.  Rajamouli Boddula, S. Kasturi, Giri. S, V. Sivakumar*, Controlled energy transfer from ligand to Eu(III) ion: A unique strategy to obtain bright white light emission and their versatile applications. Inorg. Chem., 2017, 56 (17), 10127–10130. DOI, 10.1021/acs.inorgchem.7b01255. (Citation – 38), Impact factor: 4.768

74. 60.  Kasturi Singh, Rajamouli Boddula, and Sivakumar Vaidyanathan*, Versatile Luminescent Europium(III)−β-Diketonate-imidazo-bipyridyl Complexes Intended for White LEDs: A Detailed Photophysical and Theoretical Study” Inorg. Chem., 2017, 56 (15), 9376–9390, DOI: 10.1021/acs.inorgchem.7b01565, (Citation – 53), Impact factor: 4.768

75. 61.  Aravind Babu Kajjam and V. Sivakumar*, Structural mimics of phenyl pyridine (ppy) - substituted, Phosphorescent Cyclometalated homo and heteroleptic Iridium(III) Complexes for Organic light emitting diodes - An overview. Chemical Record, 2017, 18 (3), 293-349. DOI: 10.1002/tcr.201700035, (Citation – 37), Impact factor: 10.7

76. 62.  Boddula Rajamouli and V. Sivakumar*, White light emissive bipolar ligand and their EuIII complex for white/red light emitting diodes. Journal of Photochemistry and Photobiology A: Chemistry 347, 26-40. DOI; 10.1016/j.jphotochem.2017.07.008, (Citation – 23), Impact factor: 4.291.

77. 63.  Boddula Rajamouli,  Rachna Devi,  Abhijeet Mohanty,  Venkata Krishnan  and  Sivakumar Vaidyanathan*, “Effects of electron-withdrawing groups in imidazole-phenanthroline ligands and their influence on the photophysical properties of EuIII complexes for white light-emitting diodes” New J. Chem. 2017, 41 (18), 9826 - 9839. :DOI: 10.1039/c7nj02291c, (Citation 15), Impact factor: 3.591.

78. 64.  T. Jairam, Hidayath Ulla, K. Aravind Babu, M.N. Satyanarayan, V. Sivakumar*. “Star-Shaped Phenanthroimidazole-triphenylamine based yellow organic emitter for organic light emitting diodes” –Chemistry select, 2017, 2 (8), 2611– 2620, 2017. DOI: 10.1002/slct.201700056. (Citation – 13), Impact factor: 2.109.

79. 65.  S. Kasturi and V. Sivakumar*, “Li3BaSrLa3(WO4)8:Eu3+ and Its Solid Solutions : A New Red Emitting Phosphor - Structure, Synthesis and Appraisal of Optical Properties’’  ChemistrySelect, 2 (18), 5143–5156, 2017, DOI: 10.1002/slct.201700644, (Citation 11), Impact factor: 2.109.

80. 66.  B. Rajamouli, C. S. Dwaraka Viswanath, S. Giri, C. K. Jayasankar and V. Sivakumar*, “Carbazole functionalized new bipolar ligand for monochromatic red light emitting Europium(III) complex: combined experimental and theoretical study”, New J. Chem., 2017,41(8), 3112-3123, DOI: 10.1039/C6NJ03947B (Citation – 18), Impact factor: 3.591.

81. 67.  B Rajamouli, V. Sivakumar, “Eu (III) Complexes for LEDs Based on Carbazole‐and Fluorene‐Functionalized Phenanthro‐Imidazole Ancillary Ligands: Detailed Photophysical and Theoretical Study”, ChemistrySelect 2 (14), 4138-4149, DOI: 10.1002/slct.201700266, (Citation 9), Impact factor: 2.109

82. 68.  S. Kasturi and V. Sivakumar*, “Luminescence properties of La2W2−xMoxO9 (x = 0–2): Eu3+ materials and their Judd–Ofelt analysis: novel red line emitting phosphors for pcLEDs” Mater. Chem. Front., 2017, 1 (3), 550-561. DOI: 10.1039/C6QM00118A. (Citation – 38), Impact factor: 6.059

83. 69.  K. Aravind Babu, S. Giri, V. Sivakumar*, “Triphenylamine based Donor–π–Acceptor Organic Phosphors: Synthesis, Characterization and Theoretical study”, Mater. Chem. Front., 2017, 1 (3), 512-520.  Advance Article (chosen as a best work by Editor). DOI: 10.1039/c6qm00031b. (Citation 31), Impact factor: 6.059

84. 70.  B. Rajamouli, and V. Sivakumar*, Effect of carbazole functionalization with a spacer moiety in the phenanthroimidazole bipolar ligand in a europium (III) complex on its luminescence properties: combined experimental and theoretical study”, New J. Chem., 2017, 41 (3), 1017-1027, DOI: 10.1039/C6NJ03014A. (Citation 22), Impact factor: 3.591.

85. 71.  A. D. J David, GS Muhammad, V Sivakumar, Synthesis and optical properties of Eu3+‐substituted glaserite‐type orthovanadates CsK2Y[VO4]2 Luminescence, 32 (5), 735-744, 2017. (Citation 5), Impact factor:3.599, https://doi.org/10.1002/bio.3244 .

    1. 1.  

86. 72.  S. Kasturi, S. Satish Kumar and V.Sivakumar*, “Synthesis and photoluminescence properties of red emitting phosphor La2–xEuxLi0.5Al0.5O4 [x = 0.2–2] with K2NiF4 structure” Luminescence: The Journal of Biological and Chemical Luminescence, 32 (5), 880-887. 2017 – Advanced article, DOI: 10.1002/bio.3270. (Citation 2), Impact factor:2.464.

87. 73.  S. Kasturi and V. Sivakumar*, “Eu2+ luminescence in Ca3Si2O7 and spectral widening and tuning of Eu2+ emission color (orangish-red to green) by crystal chemical substitution”, RSC Adv., 2016, 6 (101), 98652-98662. (Citation – 21), Impact factor:3.245 (highlighted in ChemInform Abstract), https://doi.org/10.1039/C6RA24258H

88. 74.  S. Kasturi and V. Sivakumar*, “Synthesis and Optical Properties of New Red Emitting Phosphor Li3BaSrGd3-xEux(MO4)8 for White LEDs”, Chemistry select, 2016, 1 (17), 5448 -5462. (Citation – 25), Impact factor: 1.811, http://dx.doi.org/10.1002/slct.201601183

89. 75.  Suneel Kumar, Rahul Sharma, Vipul Sharma, Gurunarayanan Harith, Vaidyanathan Sivakumar, Venkata Krishnan, “Role of RGO support and irradiation source on the photocatalytic activity of CdS–ZnO semiconductor nanostructures”, Beilstein J. Nanotechnol. 2016, 7, 1684–1697. (Citation – 32), Impact factor:  2.612, https://doi.org/10.3762/bjnano.7.161  

90. 76.  B. Rajamouli, P. Sood, S. Giri, V. Krishnan and V. Sivakumar*, "New dual characteristic bidentate ligand for ternary mono nuclear Europium (III) molecular complex: synthesis, photophysical, electrochemical and theoretical study" Eur. J. Inorg Chem., 2016, 2016 (24), 3900-3911. (Citation – 23), Impact factor: 2.524, https://doi.org/10.1002/ejic.201600508

91. 77.  S. Kasturi, U.V. Varadaraju and V. Sivakumar*, "Synthesis and photoluminescence of Eu(II) in Barium zinc orthosilicate -   A Novel green color emitting phosphor for white LEDs" Luminescence, 2017, 32 (3), 334-340. – DOI: 10.1002/bio.3183. (Citation – 12), Impact factor:2.464

92. 78.  S. Kasturi, D.Y. Jeon and V. Sivakumar*, “Europium-activated rare earth fluoride (LnF3:Eu3+– Ln = La, Gd) nanocrystals prepared by using ionic liquid/NH4F as a fluorine source via hydrothermal synthesis”, Luminescence, 2016, 31(5), 1138-1145. (Citation – 10), Impact factor:2.464, https://doi.org/10.1002/bio.3083

93. 79.  A. Duke John David, G. Shakil Muhammad and V. Sivakumar, “Synthesis and photoluminescence properties of Sm3+ substituted glaserite-type orthovanadates K3Y[VO4]2 with monoclinic structure”. Journal of Luminescence 177 (2016) 104–110. (Citation – 26), Impact factor:2.464, http://dx.doi.org/10.1016/j.jlumin.2016.04.025

    1. 1. Before Joining at NIT Rourkela (2005 – 2011)

94. 80.  V. Sivakumar, Gun Young Hong, Je Seok Kim and D.Y. Jeon., “Novel blue emitting phosphor Sr2.98Eu0.02Al10-xBxSiO2 [x = 0, 0.25, 0.5, 0.75 and 1] for PDP applications.” J. Luminescence., 129 (12), 2009, 1632–1636, (Citation – 12), Impact factor: 2.464. DOI: 10.1016/j.jlumin.2008.12.021

95. 81.  V. Sivakumar and U.V. Varadaraju., Eu2+, Ce3+ Luminescence and Ce3+/Eu2+ Energy Transfer Studies on Sr2LiSiO4F – “A Novel White Light Emitting Phosphor for Solid State Lighting”. J. Electrochem. Soc., 156 (7), (2009) J179 – J184, (Citation – 71), Impact factor: 4.316.  DOI: 10.1149/1.3122663

96. 82.  Ho Seong Jang, Yu-Ho Won, Sivakumar Vaidyanathan, Dong Hyuk Kim, and Duk Young Jeon, “Emission Band Change of (Sr1−xMx)3SiO5:Eu2+ (M=Ca,  Ba) Phosphor for White Light Sources Using Blue/Near-Ultraviolet LEDs”. J. Electrochem. Soc., 156 (6), (2009) J138 - J142, (Citation – 91), Impact factor:4.316. DOI: 10.1149/1.3106042

97. 83.  V. Sivakumar and D.Y. Jeon., “A Novel narrow band red emitting phosphor for white light emitting diodes” Int. J. Appl. Ceram. Technol., 6(4) (2009) 453–458, (Citation – 29), Impact factor:1.968. DOI:10.1111/j.1744-7402.2009.02371.x

98. 84.  Won Bin Im, Hyoung Sun Yoo, Sivakumar Vaidyanathan, “Ki Hyuk Kwon, Hyung Jun Park, Yong-Il Kim, Duk Young Jeon., A novel blue-emitting silica-coated KBaPO4:Eu2+ phosphor under vacuum ultraviolet and ultraviolet excitation” Materials Chemistry and Physics, 115(1), (2009), 161-164, (Citation – 69), Impact factor: 3.943. DOI: 10.1016/j.matchemphys.2008.11.050

99. 85.  Hyoung Sun Yoo, Sivakumar Vaidyanathan, Sung Wook Kim, Duk Young Jeon “Synthesis and photoluminescence properties of Yb2+ doped Ba5(PO4)3Cl phosphor for white light-emitting diodes” Optical Materials, 31(11), (2009) 1555-1558, (Citation – 36), Impact factor:2.918. DOI: 10.1016/j.optmat.2009.02.017

100. 86.  V. Sivakumar and U.V. Varadaraju., “Synthesis, phase transition and photoluminescence studies on Eu3+-substituted double perovskites—A novel orange-red phosphor for solid-state lighting” J. Solid State. Chem., 181 (12), (2008) 3344 – 3351, (Citation – 121), Impact factor: 3.498 DOI: 10.1016/j.jssc.2008.08.030

101. 87.  H. S. Yoo, W. B. Im, V. Sivakumar*, Bong Je Park, and Duk Young Jeon, “Effects of Eu2+ Concentration Variation and Ce3+ Co-doping on Photoluminescence Properties of BaGa2S4:Eu2+ Phosphor”. J. Electrochem. Soc., 155 (3), (2008) J66 – J70, (Citation – 22), Impact factor: 4.316 DOI: 10.1149/1.2825303

102. 88.  V. Sivakumar and U.V. Varadaraju, “Ce3+/Eu2+ energy transfer studies on BaMgSiO4 – A Green phosphor for three band white LEDs”. J. Electrochem. Soc., 154 (5), (2007) J167 – J171, (Citation – 53), Impact factor: 4.316. DOI: 10.1149/1.2714303

103. 89.  V. Sivakumar and U.V. Varadaraju., “An Novel Orange – red phosphor under Near UV excitation for white LEDs”. J. Electrochem. Soc., 154 (1), (2007) J28 – J31, (Citation – 101), Impact factor: 4.316. DOI: 10.1149/1.2382266

104. 90.  V. Sivakumar and U.V. Varadaraju. “A Promising Orange – Red phosphor under Near UV excitation”. Electrochem. Solid. State letters, 9(6) (2006) H35 - H38, (Citation – 109), Impact factor: 2.321 DOI: 10.1149/1.2189155

105. 91.  V. Sivakumar and U.V. Varadaraju., “Intense Red Phosphor for white LED based on Blue GaN LEDs” J. Electrochem. Soc., 153(3) (2006), H54 - H57, (Citation – 82), Impact factor: 4.316. DOI: 10.1149/1.2163781

106. 92.  V. Sivakumar and U. V. Varadaraju, “A Novel green phosphor for three band white LEDs”. SPIE proc., 5941, (2005) 1 – 9, (Citation – 3), Impact factor: NA

107. 93.  V. Sivakumar and U.V. Varadaraju., “Intense red - emitting phosphors for white LEDs”. J. Electrochem. Soc., 152(10) (2005) H168 - H171, (Citation – 133), Impact factor: 4.316. DOI: 10.1149/1.2034515

108. 94.  V. Sivakumar and U.V. Varadaraju., Environmentally benign novel green pigments: Pr1-xCaxPO4 [x = 0 – 0.4]. Bull. Mater. Sci., 28(3) (2005) 299-301 (Rapid communication), (Citation – 19), Impact factor: 1.783.  DOI: 10.1007/BF02711264.

In Refereed National Journals: 

1. A. Duke John David, G. Shakil Muhammad and V. Sivakumar*, “Synthesis and luminescence properties of Eu3+- substituted CsK2La(VO4)2 a Glaserite-type orthovanadates” International Journal of Luminescence and applications, 5, 2015, 393.

2. A. Duke John David, G. Shakil Muhammad and V. Sivakumar*, “Synthesis, Phase Formation between Solid Solutions and Photoluminescence Studies on Rare Earth Doped - Glaserite Type Orthovanadate Ca9Y(1-x)-yEux[VO4]7:Lay”. International Journal of Applied Science and Mathematics, 2 (4) 2015, 2394.

3. V. Sivakumar*, “Iridium based molecular complexes for OLED applications” International Journal of luminescence and its applications, 3(1), 2013, 45 – 48