19.7% Efficient CdSe/CdTe Solar cells Fabricated using High-Vacuum CSS System
The close-spaced sublimation (CSS) deposition system has gained significant interest from researchers due to its low cost, high-temperature processing capabilities, ease of fabrication, and high deposition rate. In this study, we used a high-vacuum CSS system to perform various heat treatments on CdSe films, followed by the deposition of CdTe without breaking the high vacuum. Formation of tellurium oxide species on the heat-treated CdSe surface facilitated the growth of larger CdTe grains was observed. CdTe solar cells fabricated using heat-treated CdSe films and copper thiocyanide as the back contact material achieved a device efficiency of 19.7%, with an open-circuit voltage (Voc) of 857 mV, a short-circuit current (Jsc) of 28.9 mA/cm<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup>, and a fill factor (FF) of 79.6%.
Authors
- Michael J. Heben (ORCID: https://orcid.org/0000-0002-3788-3471)
- Manoj K. Jamarkattel (ORCID: https://orcid.org/0000-0003-2767-5705)
- Krishna Prasad Lamichhane (ORCID: https://orcid.org/0009-0007-9301-6704)
- Adam B. Phillips (ORCID: https://orcid.org/0000-0002-2675-5052)
- Sabin Neupane (ORCID: https://orcid.org/0000-0002-9151-6285)
- I. S. Glass
- Xavier Mathew (ORCID: https://orcid.org/0000-0002-3017-5552)
- Abasi Abudulimu (ORCID: https://orcid.org/0000-0002-1794-0993)
- Randy J. Ellingson (ORCID: https://orcid.org/0000-0001-9520-6586)
- Ebin Bastola (ORCID: https://orcid.org/0000-0002-4194-3385)
- Yanfa Yan (ORCID: https://orcid.org/0000-0003-3977-5789)
- Sanjeeb Budhathoki
- Ujjwal Dhakal
Institutions
- China XD Group (China) (CN)
- University of Toledo (US)
Publication Details
- Published
- 2025-06-08
- DOI
- https://doi.org/10.1109/pvsc59419.2025.11133228
- Citations
- 1
- Primary Topic
- Chalcogenide Semiconductor Thin Films
- Type
- article
- Field-Weighted Citation Impact
- 0.73
Funders
- U.S. Department of Energy
- Office of Energy
- Air Force Research Laboratory