Publications

key projects

Single-Junction Perovskite Solar Cells (PSCs)

Fabricated PSCs using triple-cation perovskite compositions with surface passivation at ETL/HTL interfaces via alkali halides and 2D perovskites, achieved >18.8% efficiency in air ambient, and identified VOC losses.
Conducted a technoeconomic analysis of perovskite modules recycling using the System Advisor Model to estimate the levelized cost of electricity (5-7 ¢/kWh) and energy payback time.

Tandem Solar Cells

Simulated interface recombination losses in perovskite/silicon, perovskite/ perovskite, and a-Si/c-Si tandem cell via optoelectronic modelling.
Calculated optical losses using the transfer matrix method and ASA to mitigate parasitic absorption in tandem architectures.

Recycling of end-of-life (EOL) PSCs

Developed a recycling protocol enabling 3 times reuse of FTO substrates without efficiency degradation, cutting material costs.
Engineered a cleaning process for EOL substrates, validated through XPS and substrate mapping.

Solution Processing on Silicon Substrates

Developed wet processes for silicon wafers and solution-based deposition of perovskite films for perovskite/silicon tandem cell applications.
Optimized ITO via RF sputtering for silicon heterojunction cell, applied self-assembled monolayers, and engineered time-dependent surface texturing on silicon.

Publications

Published in Peer-Reviewed Journals

· P1. D. Kumar, N. K. Bansal, H. Dixit, A. Kulkarni, T. Singh, Advanced Theory and Simulations, “Numerical study on the effect of dual electron transport layer in improving the performance of perovskite–perovskite tandem solar cells,” vol. 6, no. 3, pp. 2200800, 2023. Most Viewed certificate

· P2. D. Kumar, S. Porwal, and T. Singh, Emergent Materials “Role of defects in organic–inorganic metal halide perovskite: detection and remediation for solar cell applications,” vol. 5, no. 4, pp. 987-1020, 2022.

· P3. N. Sivakumar, Dinesh Kumar, Trilok Singh & Jatindra Kumar Rath et al. Journal of Materials Science: Materials in Electronics “Effects of pure and metal chloride-treated SnO2 electron transport layer on air ambient fabricated perovskite solar cells: electrical, optical, and photovoltaic properties,” vol. 36, pp. 973, 2025.

Contribution: Device fabrication and data analysis.

· P4. M. Paul, D. Kumar, T. Singh, et al., Journal of Optics “A numerical approach for optimization of bismuth-based photo absorbers for solar cell applications,” pp. 1-19, 2024.

Contribution: Script development for tandem solar cell simulation applications.

· P5. N. K. Bansal, S. Porwal, H. Dixit, D. Kumar, and T. Singh, Energy Technology “A theoretical study to investigate the impact of bilayer interfacial modification in perovskite solar cell,” vol. 11, no. 4, p. 2201395, 2023.

Contribution: Conceptualization and proofreading.

· P6. S. Mishra, D. Kumar, T. Singh, et al., Energy Advances “Solution-processed next generation thin film solar cells for indoor light applications,” vol. 1, no. 11, pp. 761-792, 2022.

Contribution: A detailed write-up on technology and the market for indoor photovoltaics (IPVs), material properties for IPVs, and applications of silicon-based solar cells in IPVs.

· P7. H. Dixit, N. K. Bansal, S. Porwal, D. Kumar, and T. Singh, Optik “Performance assessment of earth-abundant Kesterite and lead-free chalcogenide-based perovskite solar cells using SCAPS-1D,” vol. 295, p. 171474, 2023.

Contribution: Conceptualization and proofreading.

· P8. B. Boro, D. Kumar, T. Singh et al., Lidsen “Perovskite Solar Cells: Assessment of the Materials, Efficiency, and Stability,” vol. 2, no. 4, pp 1-48, 2022.

Contributions: A detailed write-up on the performance parameters of perovskite solar cells and charge carrier dynamics.

· P9. Ramakrishna Madaka, Dinesh Kumar, Jatin Kumar Rath et al. Materials Today Proceedings “Tunnel recombination junction influence on the a-Si: H/SHJ tandem solar cell, ” vol. 39, no.5, pp. 1970-1973, 2021.

Contribution: Drift-diffusion simulations of a 2-terminal tandem device.

Book Chapters

· B1. R. Madaka, D. Kumar, et al., Springer, “Two-Dimensional Transition Metal Oxides (TMOs) for Solar Cell Applications, in Two-Dimensional Hybrid Composites: Synthesis, Properties and Applications,” 2024, pp. 53-86.

Contribution: A detailed write-up on applying 2-Dimensional (2D) TiS2, TiO2, ZnS, ZnSe, ZnO in Solar Cells.

· B2. S. Porwal, D. Kumar, T. Singh, et al., Elsevier “Other applications of halide perovskites, in Low-Dimensional Halide Perovskites”, 2023, pp. 301-333.

Contribution: A detailed write-up on applying metal halide perovskites in nonvolatile resistive random-access memory devices.

Patent

· Dinesh Kumar, Trilok Singh, Jatindra Kumar Rath “Method to recover transparent conductive oxide coated glass substrate from end-of-life (EOL) perovskite solar cells” patent no: 202511047370, India.

Conferences

· C1. Dinesh Kumar, Jatindra Kumar Rath “Rays of Opportunity: A State-by-State Analysis of India's Solar Installation and Silicon Heterojunction Module Technoeconomic,” The 2nd Global Forum and International Conference on Industrial Plasma Processes and Diagnostics, May 2025, IIT Delhi (India). (Poster).

· C2. Dinesh Kumar, Trilok Singh * et. al. “Sustainable Perovskite Solar Cell Technology via Recycling Expensive Substrate' International Conference on Sustainable Materials for Engineering Applications, 2023, IIT Madras (India), Feb. 1-3, 2024. (Oral).

· C3. Dinesh Kumar, Trilok Singh, Jatin Rath et. al “Experimental and Optoelectronic simulation strategies for perovskite-silicon tandem voltage above 2 V,” 7th Physics Inhouse Symposium 2023, Department of Physics, IIT Madras (India). ( Poster).

· C4. Dinesh Kumar, Trilok Singh * et al. “From Waste to Watts: Perovskite Solar Cell Recycling Unlocks Substrate Recovery,” XXII International Workshop on Physics of Semiconductor Devices 2023, IIT Madras (India), Dec. 14-17, 2023. (Poster).

· C5. Dinesh Kumar, Trilok Singh* “Effect of 2D perovskite layer in all-perovskite and perovskite/silicon tandem solar cells, ” ISSMD 2022 KIIT Bhubaneswar (India), Dec. 16-18, 2022. (Oral) (Certification).

· C6. Dinesh Kumar, Trilok Singh* “Charge carrier lifetime effect on the performance of the perovskite solar cell through device modeling.” IWPSD December 2021 IIT Delhi (India). (Poster).

· C7. Selected for the CLIMAFIX 2023 summit, a division of EAI (Energy Alternatives India), focused on climate innovations and technology startups.

· C8. Selected for the International Symposium on Energy: Towards Net Zero Emissions organized by Woxsen University, Hyderabad, India.

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