2025

31. Ramesh Kumar*, Bhavya Rakheja, Noora Lamminen, Francesca Fasulo, Miguel Angel Torre Cachafeiro, Chintam Hanmandlu, G. Krishnamurthy Grandhi, Monojit Bag, Ana Belén Muñoz-García, Gerrit Boschloo, Wolfgang Tress, Michele Pavone, Paola Vivo, and Erik M. J. Johansson.  "Mechanistic Insights into Ionic Conduction in Lead Halide Perovskites and Perovskite-Inspired Materials". In: Advanced Energy Materials 2025. (IF = 26) 

30. Yi Han+, Ceylan Doyranli+, Alessia Di Vito , Matthias Auf der Maur , Mokurala Krishnaiah , Paavo Mäkinen, Ramesh Kumar, Basheer Al-Anesi , Debjit Manna , Paola Vivo*. Pyridine-based Multifunctional Surface Passivators Enable Efficient and Stable Perovskite Indoor Photovoltaics. In: ACS Applied Materials and Interfaces 2025.

29. Ankush Kumar, Andreas Schander, Ramesh Kumar, Björn Lüssem. High Performance Vertical Organic Electrochemical Transistors: Structural Approaches to Maximize Performance. In: Adv. Functional Materials 2025. 

28. Ramesh Kumar*, Marcos Luginieski, Ankush Kumar, Henrique Frulani de Paula Barbosa, Andreas Schander, Björn Lüssem: Regular and Inverted Hysteresis in Organic Electrochemical Transistors: Mechanisms and Electrochemical Insights. In: Advanced Electronic Materials, 2025. (Accepted)

     27.   T Kumar, M Kumar, A Kumar, R Kumar, M Bag: A review of current progress in perovskite-based energy storage to photorechargeable systems. In: Energy & Fuels 39 (20), 9185-9231.

26. Noora Lamminen, Joshua Karlsson, Ramesh Kumar, Noolu. Srinivasa Manikanta Viswanath, Snigdha Lal, Francesca Fasulo, Marcello Righetto, Krishnaiah Mokurala, Kimmo Lahtonen, Amit Tewari, Atanas Katerski, Ilona Oja Acik, Ana Belén Muñoz-García, Michele Pavone, Laura M. Herz, G. Krishnamurthy Grandhi,* Paola Vivo*: The Promise of Operational Stability in Pnictogen-Based Perovskite-Inspired Solar Cells. In: Energy and Environmental Science Solar (EES Solar), 2025. 

25. Kumar, T., Kumar, M., Kumar, R., Pradhan, P., Ahmed, S., Ghosh, K., Patra, B., Bag, M.: Stable Electrolyte-Gated Ruddlesden-Popper Perovskites for Switchable Optoelectronic Exclusive Logic Gate (OEELG). In: ACS Nano letter, 2025. (Accepted)

24. A Suhail, S Beniwal, R Kumar, A Kumar, M Bag: Hybrid halide perovskite quantum dots for optoelectronics applications: Recent progress and perspective. In: Journal of Physics: Condensed Matter 2025.

23.     Farha Naaz Mansoorie, Pranjul Bhatt, Abhishek Tewari, Ramesh Kumar*, Monojit Bag: Unveiling the Impact of Bi3+ Heterovalent Doping on the Negative Capacitance and Ionic Conductivity of Perovskite Single Crystals: Implication in Neuromorphic …. In: ACS Applied Materials and Interfaces, 2025, 17, 2, 4218–4230. (*Corresponding Author)

2024

22.   Mokurala Krishnaiah, Kuntal Singh, Sanchi Monga, Akash Tripathi, Sougata Karmakar, Ramesh Kumar, Christos Tyrpenou, George Volonakis, Debjit Manna, Paavo Mäkinen, KV Adarsh, Saswata Bhattacharya, G Krishnamurthy Grandhi, KDM Rao, Paola Vivo: Perovskite-Inspired Cs2AgBi2I9: Perovskite‐Inspired Cs₂AgBi₂I₉: A Promising Photovoltaic Absorber for Diverse Indoor Environments. In: Advanced Energy Materials, 2024, 2404547.

21.     Chintam Hanmandlu, Soumallya Banerjee, Abhishek Kumar, Zeeshan Alam Ansari, Ramesh Kumar, Yen-Yu Wang, Lin-Chyn Yuan, Shenghan Li, Raman Sanker, Chandra Shekar Gantepogu, You-Yun Wen, Shyam Narayan Singh Yadav, Sumangaladevi Koodathil, Chun-Wei Pao, Yu-Jung Lu, Jing-Jong Shyue, Chao-Sung Lai, Chih-Wei Chu: Ion mitigation and strain regulation with 2D Semi-Metals for MA-Based perovskite materials in highly efficient solar cells. In: Chemical Engineering Journal, 2024.

20. Ramesh Kumar, Hairui Liu, Seyed Ali Nabavi, Moses S Anyebe, Suhas Mahesh, Henry Snaith, Monojit Bag, Sagar M Jain: Impact of Indium Doping in Lead-Free (CH3NH3)3Bi2–xInxI9 Perovskite Photovoltaics for Indoor and Outdoor Light Harvesting. In: ACS Applied Electronic Materials, 2024, 6 (11), 8360-8368.

19. Ramesh Kumar, Shivang Beniwal, Atif Suhail, Bhavya Rakheja, Monojit Bag, Erik MJ Johansson*:Controlling Electronic-Ionic Kinetics via Size Engineering in CsPbBr3 Perovskite Nanocrystals. In: The Journal of Physical Chemistry C, 2024, 128(33), 13917–13925.

18.     Rahul Thakuria, Tanuj Kumar, Mohit Kumar, Ramesh Kumar*, Monojit Bag: Breaking the mold: Rethinking defects in Pb-free vacancy ordered perovskites for enhanced CO2 reduction and supercapacitor functionality. In: Materials Today Chemistry, 2024, 36, 101494. (*Corresponding Author)

2023

17. R Kumar, P Srivastava, T Kumar, S Beniwal, FN Mansoorie, M Bag: Iontronics in hybrid halide perovskites for smart portable electronic devices and their challenges. In: ACS Applied Electronic Materials 6 (9), 6325-6337.

16. R Kumar, M Bag, SM Jain: Dual-edged sword of ion migration in perovskite materials for simultaneous energy harvesting and storage application. In: Iscience 26 (11).

15. Tanuj Kumar, Rahul Thakuria, Mohit Kumar, Ankush Kumar, Ramesh Kumar*, Monojit Bag: Dimensional engineering to simultaneously enhance energy density and stability of MAPbBr 3-based photo-rechargeable ion capacitors. In: Sustainable Energy & Fuels, 2023, 7(20), 5018–5028. (Featured as Cover Article) (*Corresponding Author)

14. S Beniwal, A Kumar, R Kumar, A Suhail, M Bag. Tuning Conductivity of Lead-Free Cs2AgBiBr6 Double Perovskite Ternary Composite with PEDOT:PSS and Carbon Black for Supercapacitor Application. In: The Journal of Physical Chemistry C 127 (27), 12874-12881

13.  Tanuj Kumar, Ankush Kumar, Shivang Beniwal, Ramesh Kumar*, Monojit Bag: Photo‐generated Charge Trapping in Phase Segregated Halide Perovskites–A Comprehensive Approach towards Efficient Photo‐Rechargeable Ion Capacitors. In: Batteries & Supercaps, 2023, 6, e202300213. (Featured as Cover Article) (*Corresponding Author)

2022

12.  Ramesh Kumar, Ankush Kumar, Prem Sagar Shukla, Ghanshyam Das Varma, D Venkataraman, Monojit Bag: Photorechargeable hybrid halide perovskite supercapacitors. In: ACS Applied Materials & Interfaces, 2022, 14(31), 35592–35599.

11.  Ramesh Kumar, Priya Srivastava, Tanuj Kumar, Monojit Bag: Electronic-Ionic Transport in MAPbBr3 Single Crystal: The Evidence of Super-Linear Power Law in AC Conductivity. In: The Journal of Physical Chemistry C, 2022, 126(33), 14305–14311.

10. Priya Srivastava, Ramesh Kumar, Hemant Ronchiya, Monojit Bag: Intensity modulated photocurrent spectroscopy to investigate hidden kinetics at hybrid perovskite–electrolyte interface. Scientific Reports, 2022, 12, 14212. (Homemade set-up)

2021

9.  R Kumar, M Bag: Hybrid Halide Perovskite Based Electrochemical Supercapacitors: Recent Progress and Perspective. In Energy Technology 2025.

8.  Ramesh Kumar, Monojit Bag: Quantifying capacitive and diffusion-controlled charge storage from 3D bulk to 2D layered halide perovskite-based porous electrodes for efficient supercapacitor applications. In: The Journal of Physical Chemistry C, 2021, 125(31), 16946–16954. (Most cited article- 185+)

7.  Srivastava, P.#, Kumar, R.#, Bag, M.*: The curious case of ion migration in solid-state and liquid electrolyte-based perovskite devices: Unveiling the role of charge accumulation and extraction at the interfaces. In: Physical Chemistry Chemical Physics, 2021, 23, 10936–10945. # Joint First Author

6.  Priya Srivastava, Ramesh Kumar, Monojit Bag: Discerning the role of an A-site cation and X-site anion for ion conductivity tuning in hybrid perovskites by photoelectrochemical impedance spectroscopy. In: The Journal of Physical Chemistry C, 2021, 125(1), 211–222.

5.  Ramesh Kumar, Jitendra Kumar, Monojit Bag: Fusible Low Work Function Top Electrode for Vacuum-Free Perovskite Light-Emitting Diode Application: Role of OH-Terminated Sn Atoms at the Alloy Surface. In: ACS Applied Electronic Materials, 2021, 3(6), 2757–2765.

4.  Ramesh Kumar, Jitendra Kumar, Sachin Kadian, Priya Srivastava, Gaurav Manik, Monojit Bag:Tunable ionic conductivity and photoluminescence in quasi-2D CH 3 NH 3 PbBr 3 thin films incorporating sulphur doped graphene quantum dots. In: Physical Chemistry Chemical Physics, 2021, 23, 22733–22742.

2020

3.  Ramesh Kumar, Priya Srivastava, Monojit Bag: Role of A-site cation and X-site halide interactions in mixed-cation mixed-halide perovskites for determining anomalously high ideality factor and the super-linear power law in ….. In: ACS Applied Electronic Materials, 2020, 2(12), 4087–4098.

2.  Jitendra Kumar#, Ramesh Kumar#, Kyle Frohna, Dhanashree Moghe, Samuel D Stranks, Monojit Bag: Unraveling the antisolvent dripping delay effect on the Stranski–Krastanov growth of CH 3 NH 3 PbBr 3 thin films: a facile route for preparing a textured morphology with …In: Physical Chemistry Chemical Physics, 2020, 22(45), 26592–26604. # Joint First Author

1.  Ramesh Kumar, Jitendra Kumar, Priya Srivastava, Dhanashree Moghe, Dinesh Kabra, Monojit Bag: Unveiling the morphology effect on the negative capacitance and large ideality factor in perovskite light-emitting diodes. In: ACS Applied Materials & Interfaces, 2020, 12(30), 34265–34273.