https://scholars.lib.ntu.edu.tw/handle/123456789/625463
標題: | Efficient and stable Cs2AgBiBr6 double perovskite solar cells through in-situ surface modulation | 作者: | Li B Wu X Zhang S Li Z Gao D Chen X Xiao S CHU-CHEN CHUEH Jen A.K.-Y Zhu Z. |
關鍵字: | Cs2AgBiBr6; Defect passivation; Double perovskite solar cells; Fused-ring electron acceptor; High efficiency | 公開日期: | 2022 | 卷: | 446 | 來源出版物: | Chemical Engineering Journal | 摘要: | Lead-free double perovskites have drawn increasing attention for addressing the stability and toxicity challenges from lead-based halide perovskites. However, their power conversion efficiencies (PCE) are still far behind that of Pb-based perovskite solar cells (PSCs) mainly because of the severe energy loss. Herein, we successfully employed the fused-ring electron acceptor (FREA) molecules to passivate defects in Cs2AgBiBr6-based double PSCs to realize a dramatically enhanced open-circuit voltage (VOC) from 1.079 V to 1.278 V and a champion PCE up to 3.31%, which is the highest efficiency for double PSCs to date. The strong binding of C≡N and N=C–S groups on FREA with Ag-exposed surface of Cs2AgBiBr6 effectively decreased surface trap densities and considerably suppressed non-radiative recombination. Moreover, the passivated devices showed superior long-term stability, which maintained 98.5% and 97.2% of the initial efficiency under continuous AM 1.5 G illumination and 85 ℃ heating for 300 h, respectively. This work manifests the importance of the rational design of functional passivation molecules to improve the performance and stability of double PSCs. © 2022 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131066266&doi=10.1016%2fj.cej.2022.137144&partnerID=40&md5=a64b6c3b44dcaa1969da2fac8afab44d https://scholars.lib.ntu.edu.tw/handle/123456789/625463 |
ISSN: | 13858947 | DOI: | 10.1016/j.cej.2022.137144 | SDG/關鍵字: | Bismuth compounds; Bromine compounds; Cesium compounds; Energy dissipation; Lead compounds; Molecules; Open circuit voltage; Passivation; Perovskite; Perovskite solar cells; Defect passivation; Double perovskite solar cell; Double perovskites; Electron-acceptor; Fused ring; Fused-ring electron acceptor; Higher efficiency; Power conversion efficiencies; Ring electrons; Surface modulations; Silver compounds |
顯示於: | 化學工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。