Evaporated CdSe for Efficient Polycrystalline CdSeTe Thin-Film Solar Cells
Recent progress has shown that alloying cadmium telluride (CdTe) with cadmium selenide (CdSe) to create a CdSexTe1–x (CdSeTe) gradient region can significantly boost the performance of polycrystalline CdSeTe thin-film solar cells. However, improper CdSeTe alloying might introduce problematic band alignment and deleterious voids at the front interface, limiting the benefit maximization of this technique. Here, we show that the CdSe layers deposited by thermal evaporation result in CdSeTe cells with a higher performance than the sputtered CdSe. This is because evaporated CdSe can avoid the formation of voids at the front interface, producing improved front junction quality with suppressed front junction nonradiative recombination. The champion cell using evaporated CdSe demonstrated a power conversion efficiency (PCE) of 19.7%, much higher than 18.1% in the cell using sputtered CdSe.
Authors
- Tyler Brau
- 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)
- Alisha Adhikari (ORCID: https://orcid.org/0000-0001-7210-806X)
- Chun‐Sheng Jiang (ORCID: https://orcid.org/0000-0003-0230-7500)
- H.M.A. Sharif
- Abasi Abudulimu (ORCID: https://orcid.org/0000-0002-1794-0993)
- Sandip S. Bista (ORCID: https://orcid.org/0000-0003-0162-8468)
- Randy J. Ellingson (ORCID: https://orcid.org/0000-0001-9520-6586)
- Yanfa Yan (ORCID: https://orcid.org/0000-0003-3977-5789)
- Ambalanath Shan (ORCID: https://orcid.org/0000-0002-1912-309X)
- Deng-Bing Li
- Sanjeeb Budhathoki
Institutions
- National Laboratory of the Rockies (US)
- University of Toledo (US)
Publication Details
- Journal
- ACS Energy Letters
- Published
- 2024-12-04
- DOI
- https://doi.org/10.1021/acsenergylett.4c02874
- Citations
- 10
- Primary Topic
- Chalcogenide Semiconductor Thin Films
- Type
- article
- Field-Weighted Citation Impact
- 2.09