publications

Invited Seminars/Talks

Invited talks –FDP on Catalysis: Concepts to Applications, NIT, Calicut, June 2 – 6, 2012 “Bio-Inspired Photocatalysts for Hydrogen Production”

Invited talks – FDP on Display materials and its applications, organized by RNS Institute of Technology, Bangalore, April 12 – 13, 2012. “Lamp phosphors: concepts to applications”

Invited talks – UGC sponsored National seminar on advanced materials (NASAM 2012) at Isalmiah College, Vaniyambadi – 4 – 5 March 2012 “Lanthanide based materials for solid state lightings”

Invited talks – GTER 2012 at Gurukula Kangri Vishwavidyalaya, Haridwar – 11 – 13 Feb 2012 “Europium activated oxides - Alternative Red phosphors for energy efficient solid state lighting”

Invited talks - FDP on Materials Present and Future perspectives at NIT Calicut – 12 to 16 Dec 2011 “Lanthanide activated luminescent materials as wavelength convertors – lighting and display applications”

Invited talks - FDP on Current trends in Organometallic Chemistry at NIT Calicut – 4 to 8 June 2011, “Lanthanide containing luminescent organometallic complexes and its specific applications” and “Luminescent organometallic complexes for organic light emitting diodes”

List of Publications (in reverse chronological order)

In Refereed International Journals:

1. V. Sivakumar, Gun Young Hong, Je Seok Kim and D.Y. Jeon., Novel blue emitting phosphor Sr_2.979Eu_0.021Al_10-xB_xSiO₂₀ [x = 0, 0.25, 0.5, 0.75 and 1] for PDP applications J. Luminescence., 129 (2009) 1632–1636, (Citation – 2, Self – 0)
2. V. Sivakumar and U.V. Varadaraju., Eu²⁺, Ce³⁺ Luminescence and C^e3+ ® E^u2+ Energy Transfer Studies on S_r2LiSiO₄F - A Novel White Light Emitting Phosphor for Solid State Lighting, J. Electrochem. Soc., 156 (7), (2009) J179 – J184, (Citation – 12, Self – 0)
3. Ho Seong Jang, Yu-Ho Won, Sivakumar Vaidyanathan, Dong Hyuk Kim, and Duk Young Jeon, Emission Band Change of (Sr_1−xM_x)₃SiO₅:Eu²⁺ (M=Ca, Ba) Phosphor for White Light Sources Using Blue/Near-Ultraviolet LEDs, J. Electrochem. Soc., 156 (6), (2009) J138 - J142, (Citation – 0, Self – 0)
4. 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 – 0, Self – 0).
5. 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 – 14, Self – 2)
6. 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 – 0, Self – 0)
7. 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 – 13, Self – 1)
8. Hyoung Sun Yoo, Won Bin Im, Sivakumar Vaidyanathan, Bong Je Park, and Duk Young Jeon, Effects of Eu²⁺ Concentration Variation and Ce³⁺ Codoping on Photoluminescence Properties of BaGa₂S₄:Eu²⁺ Phosphor, J. Electrochem. Soc., 155 (3), (2008) J66 – J70, (Citation – 1, Self – 0)
9. 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, (2007) J167 – J171, (Citation – 24, Self – 1)
10. V. Sivakumar and U.V. Varadaraju., A Novel Orange – red phosphor under Near UV excitation for white LEDs, J. Electrochem. Soc., 154, (2007) J28 – J31, (Citation – 20, Self – 1)
11. 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 – 20, Self – 2)
12. 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 – 30, Self – 4)
13. V. Sivakumar and U. V. Varadaraju, A Novel green phosphor for three band white LEDs. SPIE proc., 5941, (2005) 1 – 9, (Citation – 3, Self – 2)
14. V. Sivakumar and U.V. Varadaraju., Intense red - emitting phosphors for white LEDs, J. Electrochem. Soc., 152(10) (2005) H168 - H171, (Citation – 47, Self – 5)

In Refereed National Journals:

1. V. Sivakumar and U.V. Varadaraju., Environmentally benign novel green pigments: Pr_1-xCa_xPO₄ [x = 0 – 0.4]. Bull. Mater. Sci., 28(3) (2005) 299-301 (Rapid communication) , (Citation – 3, Self – 0)

In Conference Proceedings:

In International Conference Proceedings:

1. V. Sivakumar and U. V. Varadaraju, “Novel Orange Red Emitting Phosphors With Double Perovskite Structure For White LEDs”2011 16th International Conference on Luminescence, June 26 -July 31-Ann Arbor, Michigan, USA.
2. Sung Wook Kim, Sivakumar Vaidyanathan, Byoung-Hwa Kwon and Duk Young Jeon “Red Electrophosphorescent Devices Based on Iridium Complexes of Ir(fliq)₃ by solution process” 2010 KAIST International Workshop on Flexible Signage & Displays, Daejeon, Korea, (2010.07)
3. Sung Wook Kim, Hyoung Sun Yoo, Sivakumar Vaidyanathan, Byoung-Hwa Kwon, and Duk Young Jeon, “Study of Excitation Energy Transfer in Fluorine Based Host-Guest Systems" The 2nd International Seminar of Frontier of Energy Flow Dynamics in Atomistic and Electronic Scales, Sendai, Japan O-2, (2009. 12.)
4. Sivakumar Vaidyanathan, S. W. Kim, H. S. Yoo, D. Y. Jeon, “A Novel Broad Band Orange Red Emitting Phosphor for Solid State Lighting” The 15th international display workshops, Dec 2008, Japan.
5. Sung Wook Kim, Seok Hwan Hwang, Hyoung Sun Yoo, Sivakumar Vaidyanathan and Duk Young Jeon, “New Concept of Flexible OLED with every Light Emitting Pixel which is Crossed by Electrode Strip” The 15th international display workshops, Dec 2008, Japan – Poster presentation.

1. H. S. Yoo, Sivakumar Vaidyanathan, S. W. Kim, J. Y. Han, D. Y. Jeon, “Synthesis and Photoluminescence Properties of Chlorophosphate Phosphor for White Light-Emitting Diodes” The 15th international display workshops, Dec 2008, Japan.

1. Sivakumar Vaidyanathan and D. Y. Jeon, "Search for new red phosphors under NUV/blue excitation - the stimulating future for solid state lighting", International Meeting on Information Display 2008, Ilsan, Korea, p.1350 (2008. 10.).

1. B. -H. Kwon, Sivakumar Vaidyanathan, H. Li, H. S. Jang, H. S. Yoo, and D. Y. Jeon, "Luminescent characteristics of a blue-emitting CaAl₂Si₂O₈:Eu²⁺ phosphor and the effect of boron ion substitution", International Meeting on Information Display 2008, Ilsan, Korea, p.578 (2008. 10.)

1. B. -H. Kwon, Sivakumar Vaidyanathan, H. Li, H. S. Jang, H. S. Yoo, and D. Y. Jeon, "Luminescent characteristics of a blue-emitting CaAl₂Si₂O₈: Eu²⁺ phosphor", Joint symposium on materials science and engineering, Gyeongju, Korea, P 53(PE7) (2008. 9.)
2. K. H. Kwon, Sivakumar Vaidyanathan, W. B. Im, H. S. Jang, H. S. Yoo, S. W. Kim and D. Y. Jeon, "Synthesis of Sr₂MgSi₂O₇:Eu²⁺ phosphor and its luminescent properties under UV/VUV excitation", The International Conference of the Korean Ceramic Society for 50th Anniversary, Seoul, Korea, 155 November (2007)
3. Jung sub Lee, Sivakumar Vaidyanathan, Duk Young Jeon, ‘Formation of Sm-Multiwalled carbon annotube composite layer for the application of thermal interface materials” The 9 th International symposium on electronic materials and packaging, Daejeon, Republic of korea 11. 2007)
4. H. S. Yoo, B. J. Park, Sivakumar Vaidyanathan, J. S. Lee, and D. Y. Jeon, " Photoluminescence enhancement of BaGa₂S₄:Eu²⁺ phosphor by co-doping of Ce³⁺ ion ", Joint Symposium on Materials Science and Engineering for the 21^st Century 2007, Hsinchu, Taiwan, p. 50, 2007. 10
5. W. B. Im, H. S. Yoo, V. Sivakumar, K. H. Kwon, H. J. Park, Y.-I. Kim, D. Y. Jeon., “Luminescence Property of Eu²⁺-Doped KBaPO₄ Phosphor under Ultraviolet and Vacuum Ultraviolet Excitation”, The 14^th International display workshops Dec 2007, Japan
6. V. Sivakumar and U.V. Varadaraju “A Novel Blue phosphor for Solid State Lighting” in ASID 2006, New Delhi Organised by IIT Kanpur, India.
7. Sivakumar Vaidyanathan and Varadaraju Upadhyayula, “A Novel green phosphor for three band white LEDs” in 5^th International Conference on Solid State Lighting, July 2005, San Diego, California USA.
8. V. Sivakumar and U.V. Varadaraju (2005) “Synthesis and optical properties of BiMgVO₅:Eu³⁺” in OMTAT 2005, Cochin, India.
9. V. Sivakumar and U.V. Varadaraju (2005) “Novel green phosphors in the system: NaY_0.95Tb_0.05(WO₄)_2-x(MoO₄)_x (x = 0.25 – 2)” in OMTAT 2005, Cochin, India.
10. V. Sivakumar and U.V. Varadaraju (2005) “New Europium activated phosphor materials for white LEDs” in ICAMDD 2005, Goa, India

In National Conference Proceedings:

1. V. Sivakumar and U.V. Varadaraju “A Novel red phosphor under UV excitation” in CRSI: Chemistry Symposium 2006 – IIT Madras, India – Poster presentation.
2. V. Sivakumar and U.V. Varadaraju “A novel orange red phosphor for white LEDs” in NCLA 2006, Amravathi, India – Poster Presentation.
3. V. Sivakumar and U.V. Varadaraju (2005) Novel red phosphors for solid state lighting: the system AgGd(WO₄)_2-x(MoO₄)_x:Eu³⁺. National Conference on Luminescence and its Applications, Bangalore, India.
4. V. Sivakumar and U.V. Varadaraju (2005) Photoluminescent properties of NaY(WO₄)_2-x(MoO₄)_x:Eu³⁺ phosphor. National Conference on Luminescence and its Applications, Bangalore, India.
5. V. Sivakumar and U.V. Varadaraju, “Luminescence of Sm³⁺ in Eulytine, Ba₃La(PO₄)₃” in Chemist’s Meet – 2004, March 2004, Organized by Chemistry Department, IIT Madras, India.
6. V. Sivakumar, N. Lakshminarasimhan and U.V. Varadaraju, “Synthesis and Optical Properties of Calcium Substituted Monazite CePO₄” in Materials for Future (MF 2004), Feb 2004, Organized by Materials Research Centre, IISC Bangalore, India.