Achieving High-Performance in Flexible CIGS Solar Cells Through Advanced Deposition Optimization

Jackson Lontchi; Vincent Dufoulon; Alexandre Crossay; Damien Gamet; Thomas Tom; Amelle Rebai; Jorge Posada; F. Donsanti; Daniel Lincot; Jean Francois Guillemoles; Negar Naghavi

doi:10.1109/PVSC59419.2025.11132832

Achieving High-Performance in Flexible CIGS Solar Cells Through Advanced Deposition Optimization

Jackson Lontchi
, Vincent Dufoulon
, Alexandre Crossay
, Damien Gamet
, Thomas Tom
, Amelle Rebai
, Jorge Posada
, F. Donsanti
, Daniel Lincot
, Jean Francois Guillemoles
, Negar Naghavi

Université Paris-Saclay
Institut Photovoltaïque d'Ile-de-France
IPVF

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Citations (Scopus)

Abstract

This study investigates advanced optimization strategies to enhance the performance of Cu(In,Ga)Se2 (CIGS) solar cells on flexible polyimide substrates. To ensure stable operation near the thermal limits of the polyimide, the deposition temperature was carefully optimized to balance performance improvements with substrate integrity. At low deposition temperatures, key performance drivers were identified, including precise control of the gallium gradient, the positioning of the bandgap notch, and alkali metal post-deposition treatments. These factors play a critical role and need further refinement. This paper examines how these combined parameters affect the material properties of the absorbers as well as the Voc, Jsc, and the fill factor (FF), enabling high-performance, low-temperature CIGS solar cells with efficiencies reaching 17.4% (without antireflecting layer). This progress expands their potential for lightweight and portable photovoltaic applications.

Original language	English
Title of host publication	2025 IEEE 53rd Photovoltaic Specialists Conference, PVSC 2025
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	438-440
Number of pages	3
ISBN (Electronic)	9798331534448
DOIs	https://doi.org/10.1109/PVSC59419.2025.11132832
Publication status	Published - 1 Jan 2025
Event	53rd IEEE Photovoltaic Specialists Conference, PVSC 2025 - Montreal, Canada Duration: 8 Jun 2025 → 13 Jun 2025

Publication series

Name	Conference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)	0160-8371

Conference

Conference	53rd IEEE Photovoltaic Specialists Conference, PVSC 2025
Country/Territory	Canada
City	Montreal
Period	8/06/25 → 13/06/25

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Access to Document

10.1109/PVSC59419.2025.11132832

Cite this

Lontchi, J., Dufoulon, V., Crossay, A., Gamet, D., Tom, T., Rebai, A., Posada, J., Donsanti, F., Lincot, D., Guillemoles, J. F., & Naghavi, N. (2025). Achieving High-Performance in Flexible CIGS Solar Cells Through Advanced Deposition Optimization. In 2025 IEEE 53rd Photovoltaic Specialists Conference, PVSC 2025 (pp. 438-440). (Conference Record of the IEEE Photovoltaic Specialists Conference). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC59419.2025.11132832

Lontchi, Jackson ; Dufoulon, Vincent ; Crossay, Alexandre et al. / Achieving High-Performance in Flexible CIGS Solar Cells Through Advanced Deposition Optimization. 2025 IEEE 53rd Photovoltaic Specialists Conference, PVSC 2025. Institute of Electrical and Electronics Engineers Inc., 2025. pp. 438-440 (Conference Record of the IEEE Photovoltaic Specialists Conference).

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title = "Achieving High-Performance in Flexible CIGS Solar Cells Through Advanced Deposition Optimization",

abstract = "This study investigates advanced optimization strategies to enhance the performance of Cu(In,Ga)Se2 (CIGS) solar cells on flexible polyimide substrates. To ensure stable operation near the thermal limits of the polyimide, the deposition temperature was carefully optimized to balance performance improvements with substrate integrity. At low deposition temperatures, key performance drivers were identified, including precise control of the gallium gradient, the positioning of the bandgap notch, and alkali metal post-deposition treatments. These factors play a critical role and need further refinement. This paper examines how these combined parameters affect the material properties of the absorbers as well as the Voc, Jsc, and the fill factor (FF), enabling high-performance, low-temperature CIGS solar cells with efficiencies reaching 17.4\% (without antireflecting layer). This progress expands their potential for lightweight and portable photovoltaic applications.",

author = "Jackson Lontchi and Vincent Dufoulon and Alexandre Crossay and Damien Gamet and Thomas Tom and Amelle Rebai and Jorge Posada and F. Donsanti and Daniel Lincot and Guillemoles, \{Jean Francois\} and Negar Naghavi",

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month = jan,

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doi = "10.1109/PVSC59419.2025.11132832",

language = "English",

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Lontchi, J, Dufoulon, V, Crossay, A, Gamet, D, Tom, T, Rebai, A, Posada, J, Donsanti, F, Lincot, D, Guillemoles, JF & Naghavi, N 2025, Achieving High-Performance in Flexible CIGS Solar Cells Through Advanced Deposition Optimization. in 2025 IEEE 53rd Photovoltaic Specialists Conference, PVSC 2025. Conference Record of the IEEE Photovoltaic Specialists Conference, Institute of Electrical and Electronics Engineers Inc., pp. 438-440, 53rd IEEE Photovoltaic Specialists Conference, PVSC 2025, Montreal, Canada, 8/06/25. https://doi.org/10.1109/PVSC59419.2025.11132832

Achieving High-Performance in Flexible CIGS Solar Cells Through Advanced Deposition Optimization. / Lontchi, Jackson; Dufoulon, Vincent; Crossay, Alexandre et al.
2025 IEEE 53rd Photovoltaic Specialists Conference, PVSC 2025. Institute of Electrical and Electronics Engineers Inc., 2025. p. 438-440 (Conference Record of the IEEE Photovoltaic Specialists Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Achieving High-Performance in Flexible CIGS Solar Cells Through Advanced Deposition Optimization

AU - Lontchi, Jackson

AU - Dufoulon, Vincent

AU - Crossay, Alexandre

AU - Gamet, Damien

AU - Tom, Thomas

AU - Rebai, Amelle

AU - Posada, Jorge

AU - Donsanti, F.

AU - Lincot, Daniel

AU - Guillemoles, Jean Francois

AU - Naghavi, Negar

PY - 2025/1/1

Y1 - 2025/1/1

N2 - This study investigates advanced optimization strategies to enhance the performance of Cu(In,Ga)Se2 (CIGS) solar cells on flexible polyimide substrates. To ensure stable operation near the thermal limits of the polyimide, the deposition temperature was carefully optimized to balance performance improvements with substrate integrity. At low deposition temperatures, key performance drivers were identified, including precise control of the gallium gradient, the positioning of the bandgap notch, and alkali metal post-deposition treatments. These factors play a critical role and need further refinement. This paper examines how these combined parameters affect the material properties of the absorbers as well as the Voc, Jsc, and the fill factor (FF), enabling high-performance, low-temperature CIGS solar cells with efficiencies reaching 17.4% (without antireflecting layer). This progress expands their potential for lightweight and portable photovoltaic applications.

AB - This study investigates advanced optimization strategies to enhance the performance of Cu(In,Ga)Se2 (CIGS) solar cells on flexible polyimide substrates. To ensure stable operation near the thermal limits of the polyimide, the deposition temperature was carefully optimized to balance performance improvements with substrate integrity. At low deposition temperatures, key performance drivers were identified, including precise control of the gallium gradient, the positioning of the bandgap notch, and alkali metal post-deposition treatments. These factors play a critical role and need further refinement. This paper examines how these combined parameters affect the material properties of the absorbers as well as the Voc, Jsc, and the fill factor (FF), enabling high-performance, low-temperature CIGS solar cells with efficiencies reaching 17.4% (without antireflecting layer). This progress expands their potential for lightweight and portable photovoltaic applications.

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DO - 10.1109/PVSC59419.2025.11132832

M3 - Conference contribution

AN - SCOPUS:105016222574

T3 - Conference Record of the IEEE Photovoltaic Specialists Conference

SP - 438

EP - 440

BT - 2025 IEEE 53rd Photovoltaic Specialists Conference, PVSC 2025

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 53rd IEEE Photovoltaic Specialists Conference, PVSC 2025

Y2 - 8 June 2025 through 13 June 2025

ER -

Lontchi J, Dufoulon V, Crossay A, Gamet D, Tom T, Rebai A et al. Achieving High-Performance in Flexible CIGS Solar Cells Through Advanced Deposition Optimization. In 2025 IEEE 53rd Photovoltaic Specialists Conference, PVSC 2025. Institute of Electrical and Electronics Engineers Inc. 2025. p. 438-440. (Conference Record of the IEEE Photovoltaic Specialists Conference). doi: 10.1109/PVSC59419.2025.11132832

Achieving High-Performance in Flexible CIGS Solar Cells Through Advanced Deposition Optimization

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UN SDGs

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