AI Article Synopsis
- Selenium is a promising material for solar cells due to its high absorption and photoconductivity but has low efficiency because its bandgap is too high and lacks a good electron transport layer.
- By alloying 30% Tellurium with 70% Selenium, the bandgap is optimized to 1.36 eV, ideal for solar cell performance.
- Using a ZnO electron transport layer with a good interface leads to a significant increase in efficiency, reaching 1.85% for the ZnO/SeTe solar cells.
Article Abstract
Selenium (Se) element is a promising light-harvesting material for solar cells because of the large absorption coefficient and prominent photoconductivity. However, the efficiency of Se solar cells has been stagnated for a long time owing to the suboptimal bandgap (> 1.8 eV) and the lack of a proper electron transport layer. In this work, we tune the bandgap of the absorber to the optimal value of Shockley-Queisser limit (1.36 eV) by alloying 30% Te with 70% Se. Simultaneously, ZnO electron transport layer is selected because of the proper band alignment, and the mild reaction at ZnO/SeTe interface guarantees a good-quality heterojunction. Finally, a superior efficiency of 1.85% is achieved on ZnO/SeTe solar cells.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9756246 | PMC |
| http://dx.doi.org/10.1007/s12200-022-00040-5 | DOI Listing |
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