LEPETIT Thomas

Categories: PROFESSOR AND RESEARCHER, TEAM MIOPS

Senior Lecturer

Functions :

Associate Professor in Thin-Film Photovoltaics – Institute of Materials of Nantes Jean Rouxel (IMN-UMR6502)
Director of the Preparatory Cycle- Polytech Nantes School of Engineering

Qualifications :

63 – Electrical, Electronic, Photonic, and Systems Engineering
28 – Condensed Matter and Materials

Expertises :

Photovoltaics
Chalcogenide thin films coevaporation

Main research topics
Low-temperature synthesis of wide bandgap selenide absorbers for PV applications

Current research projects :

SITA HORIZON CL5-D3-02-04
PASTEL ANR-PRCE CE05
SIPHON ANR-JCJC-CE05
IOTA PEPR-TASE 22-PETA-0005 2024, ongoing
PARACELSis M.ERA-NET

Biography:
Thomas Lepetit received his M.S. in Applied Physics from the École Normale Supérieure de Cachan in 2012 and his Ph.D. in Materials Science from the University of Nantes in 2015. His doctoral research focused on the synthesis and characterization of chalcogenide thin films for photovoltaic applications, particularly heavy alkali post-treatments applied to Cu(In,Ga)Se₂ absorbers, which enable high photovoltaic conversion efficiencies. He also explored in-situ treatments based on metal halides, which promote crystallization and support low-temperature growth.
Dr. Lepetit is currently an associate researcher at the Institut des Matériaux Jean Rouxel (IMN) and leads the preparatory cycle at Polytech Nantes, the engineering school of Nantes University, managing a cohort of approximately 350 students. He is or has been actively involved in several national (ANR-PRCE PASTEL, ANR-PEPR IOTA, ANR-JCJC SIPHON) and international (HORIZON-SITA, M-ERA.NET PARACELSis) research projects, including the co-supervision of three postdoctoral researchers and two Ph.D. candidates. He has co-authored more than 20 articles in peer reviewed journal (h-index of 12).

Teaching:
Electromagnetsim, Optics, Power electronics conversion, Multidisciplinary projects

Publications:
20 peer-reviewed publications
index: 12
i10 index: 16

Palmiotti, E., Tsoulka, P., Poudel, D., Marsillac, S., Barreau, N., Rockett, A., & Lepetit, T. (2022). Homogeneous CuGaSe2 growth by the CuPRO process with In-Situ AgBr treatment. Thin Solid Films, 762, 139488. (https://doi.org/10.1016/j.tsf.2022.139488)
Lepetit, T., Harel, S., Arzel, L., Ouvrard, G., & Barreau, N. (2017). KF post deposition treatment in co-evaporated Cu(In,Ga)Se2 thin film solar cells: Beneficial or detrimental effect induced by the absorber characteristics. Progress in Photovoltaics: Research and Applications, 25(12), 1068-1076. (https://doi.org/10.1002/pip.2924)
Lepetit, T., Harel, S., Arzel, L., Ouvrard, G., & Barreau, N. (2016). Coevaporated KInSe2: a fast alternative to KF postdeposition treatment in high-efficiency Cu(In,Ga)Se2 thin film solar cells. IEEE Journal of Photovoltaics, 6(5), 1316-1320. (https://doi.org/10.1109/jphotov.2016.2589365)

Link to publi HAL: https://cv.hal.science/thomas-lepetit
Link to orcid: 0000-0003-4010-2282
Link to scholar.google.fr: https://scholar.google.com/citations?user=DkHzmC0AAAAJ&hl=fr&oi=ao