1. Precursor engineering enables high-performance all-inorganic CsPbIBr2 perovskite solar cells with a record efficiency approaching 13%
- Author
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Chang, Qingyan, An, Yidan, Cao, Huaiman, Pan, Yuzhen, Zhao, Liangyu, Chen, Yulong, We, Yi, Tsang, Sai Wing, Yip, Hin Lap, Sun, Licheng, Yu, Ze, Chang, Qingyan, An, Yidan, Cao, Huaiman, Pan, Yuzhen, Zhao, Liangyu, Chen, Yulong, We, Yi, Tsang, Sai Wing, Yip, Hin Lap, Sun, Licheng, and Yu, Ze
- Abstract
All-inorganic CsPbIBr2 perovskite has attracted widespread attention in photovoltaic and other optoelectronic devices because of its superior thermal stability. However, the deposition of high-quality solution-processed CsPbIBr2 perovskite films with large thicknesses remains challenging. Here, we develop a triple-component precursor (TCP) by employing lead bromide, lead iodide, and cesium bromide, to replace the most commonly used double-component precursor (DCP) consisting of lead bromide and cesium iodide. Remarkably, the TCP system significantly increases the solution concentration to 1.3 M, leading to a larger film thickness (∼390 nm) and enhanced light absorption. The resultant CsPbIBr2 films were evaluated in planar n-i-p structured solar cells, which exhibit a considerably higher optimal photocurrent density of 11.50 mA cm−2 in comparison to that of DCP-based devices (10.69 mA cm−2). By adopting an organic surface passivator, the maximum device efficiency using TCP is further boosted to a record efficiency of 12.8% for CsPbIBr2 perovskite solar cells., QC 20231227
- Published
- 2024
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