Rapid thermal evaporation for cadmium selenide thin-film solar cells.
Front Optoelectron
; 14(4): 482-490, 2021 Dec.
Article
em En
| MEDLINE
| ID: mdl-36637762
ABSTRACT
Cadmium selenide (CdSe) belongs to the binary II-VI group semiconductor with a direct bandgap of â¼1.7 eV. The suitable bandgap, high stability, and low manufacturing cost make CdSe an extraordinary candidate as the top cell material in silicon-based tandem solar cells. However, only a few studies have focused on CdSe thin-film solar cells in the past decades. With the advantages of a high deposition rate (â¼2 °m/min) and high uniformity, rapid thermal evaporation (RTE) was used to maximize the use efficiency of CdSe source material. A stable and pure hexagonal phase CdSe thin film with a large grain size was achieved. The CdSe film demonstrated a 1.72 eV bandgap, narrow photoluminescence peak, and fast photoresponse. With the optimal device structure and film thickness, we finally achieved a preliminary efficiency of 1.88% for CdSe thin-film solar cells, suggesting the applicability of CdSe thin-film solar cells.
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2021
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Article