Na Diffusion and Device Performance of AgBr Treated CuGaSe2 Thin Films

Palmiotti, Elizabeth; Tsoulka, Polyxeni; Lepetit, Thomas; Barreau, Nicolas; Rockett, Angus

doi:10.1109/pvsc48317.2022.9938605

Na Diffusion and Device Performance of AgBr Treated CuGaSe₂ Thin Films

Conference · 05 June 2022 · 2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)

DOI:https://doi.org/10.1109/pvsc48317.2022.9938605· OSTI ID:1991321

Palmiotti, Elizabeth ^[1]; Tsoulka, Polyxeni ^[2]; Lepetit, Thomas ^[2]; Barreau, Nicolas ^[2]; Rockett, Angus ^[3]

Colorado School of Mines, Golden, CO (United States); Colorado School of Mines
Université de Nantes (France)
Colorado School of Mines, Golden, CO (United States)

Previous work demonstrated that uniform CuGaSe2 (CGS) thin films with large grains could be grown using a short AgBr vapor treatment during growth. Here, devices made with this treated CGS showed better performance compared to devices made with standard material. Here, it is shown that AgBr treated CGS device performance worsens over time and is attributed to the suppression of Na diffusion. A NaF post-deposition treatment is shown to effectively introduce Na into the AgBr treated CGS film and prevent device degradation.

Research Organization:: Colorado School of Mines, Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; National Science Foundation (NSF)

DOE Contract Number:: EE0007551

OSTI ID:: 1991321

Journal Information:: 2022 IEEE 49th Photovoltaics Specialists Conference (PVSC), Journal Name: 2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)

Country of Publication:: United States

Language:: English

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