Education

Awards

• DAAD Research Scholarship to pursue Doctorate at the Technical University of Munich, 2017-2021
• CSIR-JRF 2015 (Junior Research Fellowship) and NET 2015 (National Eligibility Test)
• GATE 2014 (Graduate Aptitude Test in Engineering) Scholarship
• IIT JEE 2010 (Indian Institute of Technology, Joint Entrance Exam)

Journal Publications

1. A. Singh and A. Gagliardi. Drift-diffusion modeling of perovskite solar cells: past and future possibilities. EES Solar, 2025.  https://doi.org/10.1039/D5EL00040H
2. J. Hieulle, A. Krishna, A. Boziki, J. N. Audinot, M. U. Farooq, J. F. Machado, M. M., H. Phirke, A. Singh, T. Wirtz, A. Tkatchenko, M. Graetzel, A. Hagfeldt and A. Redinger. Understanding and decoupling the role of wavelength and defects in light-induced degradation of metal-halide perovskites. Energy & Environmental Science, 17, 2024, 184-295. DOI: 10.1039/D3EE03511E. 
3. H. Phirke, S. Gharabeiki, A. Singh, A. Krishna, S. Siebentritt & A. Redinger. Quantifying recombination and charge carrier extraction in halide perovskites via hyperspectral time-resolved photoluminescence imaging. APL Energy, 2, 1, 2024, 016111. https://doi.org/10.1063/5.0188166.
4. A. Krishna, V. Škorjanc, M. Dankl, J. Hieulle, H. Phirke, A. Singh,  E. A. Alharbi, H. Zhang, F. Eickemeyer, S. M. Zakeeruddin, G. N. M. Reddy, A. Redinger, U. Rothlisberger, M. Grätzel and A. Hagfeldt. Mitigating the Heterointerface Driven Instability in Perovskite Photovoltaics. ACS Energy Letters, 8, 8, 2023, 3604-3613. DOI: 10.1021/acsenergylett.3c01029.
5. A. Singh, J. Hieulle, J. F. Machado, S Gharabeiki, W. Zuo, M. U. Farooq, H. Phirke, M. Saliba and A. Redinger, Coevaporation stabilizes tin based perovskites in a single Sn-oxidation state. Nano Letters, 22, 17, 2022, 7112-7118. DOI: 10.1021/acs.nanolett.2c02204.
6. W. Kaiser, K. Hussain, A. Singh, A. A. Alothman, D. Meggiolaro, A. Gagliardi, E. Mosconi and Filippo De Angelis, Defect Formation and Healing at Grain Boundaries in Lead-Halide Perovskites. Journal of Materials Chemistry A, 10, 2022, 24854-24865. DOI: 10.1039/D2TA06336K.
7. A. Singh and T. Mukherjee, Application of carotenoids in sustainable energy and green electronics. Materials Advances, 3, 3, 2022, 1341-1358. DOI: 10.1039/D1MA01070K.
8. S. Siebentritt, U.Rau, S. Gharabeiki, T. P. Weiss, A. Prot, T. Wang, D. Adeleye, M. Drahem and A. Singh, Photoluminescence assessment of materials for solar cell absorbers. Faraday Discussions, 239, 2022, 112-129. DOI: 10.1039/D2FD00057A.
9. A. Singh, F. Matteocci, H. Zhu, D. Rossi, S. Mejaouri, S. Cacovich, M. A. D. Maur, F. Sauvage, A. Gagliardi, M. Grätzel and A. D. Carlo, Methylamine gas treatment affords improving semi-transparency, efficiency and stability of CH₃NH₃PbBr₃-based perovskite solar cells. Solar RRL, 5, 9, 2021, 2100277. DOI: 10.1002/solr.202100277.
10. A. Singh, W. Kaiser and A. Gagliardi, Role of cation-mediated recombination in perovskite solar cells. Solar Energy Materials and Solar Cells, 221, 2021, 110912. DOI: 10.1016/j.solmat.2020.110912.
11. L. Canil, T. Cramer, B. Fraboni, D. Ricciarelli, D. Meggiolaro, A. Singh, M. Liu, M. Rusu, C. M. Wolff, N. Phung, Q. Wang, D. Neher, T. Unold, P. Vivo, A. Gagliardi, F. D. Angelis and A. Abate, Tuning Halide Perovskite Energy Levels. Energy & Environmental Science, 14, 3, 2021, 1429-1438. DOI: 10.1039/D0EE02216K.
12. A. Singh and A. Gagliardi, Device simulation of all-Perovskite four-terminal tandem solar cells: Towards 33% efficiency, EPJ Photovoltaics, 12, 2021, 4. DOI: 10.1051/epjpv/2021004.
13. K.P. Nagarajun, B.S. Vikram, R. Prakash, A. Singh, S. K. Selvaraja and V.R. Supradeepa, Optical frequency comb based on nonlinear spectral broadening of a phase modulated comb source driven by dual offset locked carriers. Optics Letters, 45, 4, 2020, 893-896. DOI: 10.1364/OL.381319.
14. B.S. Vikram, R. Prakash, K.P. Nagarajun, A. Singh, S. K. Selvaraja and V.R. Supradeepa. Generation of multi-wavelength source spanning the entire c-band by nonlinear spectral broadening of dual-carrier electro-optic frequency combs. OSA Continuum, 3, 8, 2020, 2185. DOI: 10.1364/OSAC.401107.
15. A. Singh and A. Gagliardi, Efficiency of all-perovskite two-terminal tandem solar cells: A drift-diffusion study. Solar Energy, 187, 2019, 39-46. DOI: 10.1016/j.solener.2019.05.006.
16. A. Singh, E. Radicchi, S. Fantacci, F. Nunzi, F. De Angelis and A. Gagliardi, Interface electrostatics of solid-state dye-sensitized solar cells: A joint drift-diffusion and density functional theory study. The Journal of Physical Chemistry C, 123, 24, 2019, 14955-14963. DOI: 10.1021/acs.jpcc.9b03658.
17. P.K. Kanaujia, A. Singh and G. V. Prakash, Silicon‐based inorganic-organic hybrid nanocomposites for optoelectronic applications. Energy Technology, 5, 10, 2017, 1795-1799. DOI: 10.1002/ente.201700355

Conferences Papers

1. A. Singh and A. Gagliardi, Role of ion-assisted recombination and grain boundaries in perovskite solar cell hysteresis and efficiency. In 2020 IEEE 20th International Conference on Nanotechnology (IEEE-NANO), IEEE, 2020, 227-232, DOI: 10.1109/NANO47656.2020.9183602.
2. K. P. Nagarjun, B. S. Vikram, R. Prakash, S. Suparna, A. Singh, S. K. Selvaraja and V. R. Supradeepa, Frequency offset locked dual-carrier excitation of phase-modulated electro-optic frequency combs for bandwidth scaling and nonlinear spectral broadening. In Proc. SPIE 10561, Next-Generation Optical Communication: Components, Sub-Systems, and Systems VII, SPIE, 2018, 1056109, DOI: 10.1117/12.2290148.

Conference Presentations

1. A. Singh, J. Hieulle, H. Phirke, S. Gharabeiki, M. U. Farooq, R. Ahmed, J. A. F. Machado, S. Siebentritt and A. Redinger, Synthesis and characterization of CH₃NH₃SnI₃ films: A path towards stable lead-free perovskite solar cells. In Pace Young Scientist Conference, Luxembourg, Oral Presentation, 10-12 Oct 2022.
2. A. Singh, J. Hieulle, H. Phirke, J. A. F. Machado, S. Gharabeiki, R. Ahmad,
   S. Siebentritt and A. Redinger, Sn⁴⁺-free, stable tin perovskite films for lead-free perovskite solar cells. In 2022 IEEE 49th Photovoltaic Specialists Conference (PVSC), Philadelphia, USA, Oral Presentation, 5-10 June 2022, https://ieeexplore.ieee.org/abstract/document/9938891
3. J. Hieulle, M. U. Farooq, J. A. F. Machado, A. Singh, A. Krishna, A. Hagfeldt and A. Redinger, Intrinsic Light Instabilities in Metal Halide Perovskites. In 2022 MRS Fall Meeting, Oral Presentation, Boston, USA, 26 Nov - 1 Dec 2022,  https://www.mrs.org/docs/default-source/meetings-events/fall-meetings/2022/f22-program-final.pdf?sfvrsn=8bdc60e_2

H. Phirke, A. Singh, J. Hieulle, A Redinger and A. Krishna, Inhomogeneities in lead halide perovskite absorbers revealed by quantitative Photoluminescence Imaging. In International Conference on Hybrid and Organic Photovoltaics (HOPV22), Valencia, Spain, Oral presentation, 19-25 May 2022, https://doi.org/10.29363/nanoge.hopv.2022.073.

1. A. Singh, and A. Gagliardi. Role of Ionic-Assisted Recombination and Grain Boundaries in Perovskite Solar Cell Hysteresis and Efficiency. In IEEE 20th International Conference on Nanotechnology (IEEE-NANO: Virtual), Montreal, Canada, Oral presentation, 29-31 July 2020, DOI: 10.1109/NANO47656.2020.9183602.
2. A. Singh, E. Radicchi, S. Fantacci, F. Nunzi, F. D. Angelis and A. Gagliardi, Investigation of interface electrostatics of solid-state dye sensitized solar cells. In 2^nd Dyenamo DSSC Conference, Uppsala, Sweden, Oral presentation, 14-15 October 2019, https://dyenamo.se/conference_program_day1.php.
3. A. Singh and A. Gagliardi, Drift-diffusion and machine learning for high efficiency perovskite-perovskite based tandem solar cells. In International Conference on Hybrid and Organic Photovoltaics (HOPV), Rome, Italy, Poster presentation, 12-14 May 2019, https://www.nanoge.org/proceedings/HOPV19/5c35fb65c551940ccd2f4349.
4. A. Gagliardi, A. Singh and W. Kaiser, Simulation of ion migration in perovskite solar cells using a Kinetic Monte Carlo/Drift-diffusion numerical model and analysis of the impact on device performance. In International Conference on Hybrid and Organic Photovoltaics (HOPV), Benidorm, Spain, Oral presentation, 28-31 May, 2018, DOI: 10.29363/nanoge.hopv.2018.099.
5. K. P. Nagarjun, B. S. Vikram, R. Prakash, S. Suparna, A. Singh, S. K. Selvaraja and V. R. Supradeepa. Frequency offset locked dual-carrier excitation of phase-modulated electro-optic frequency combs for bandwidth scaling and nonlinear spectral broadening. In Proc. SPIE 10561, Next-Generation Optical Communication: Components, Sub-Systems, and Systems VII, San Francisco, United States, Oral presentation, January 2018. DOI: 10.1117/12.2290148.
6. A. Singh, M. Gupta and D.S. Mehta, Solar pumped Nd:YAG laser systems. In International conference on Light and Light Based Technologies (ICLLT), Tezpur, Assam, Oral presentation: ICL2T/2016/092, November 2016.