串联
材料科学
钙钛矿(结构)
带隙
能量转换效率
单层
表面改性
光电子学
钙钛矿太阳能电池
部分
光电流
纳米技术
化学工程
化学
有机化学
复合材料
工程类
作者
Devthade Vidyasagar,Yeonghun Yun,Jae Yu Cho,Hye‐Min Lee,Kyung Won Kim,Yong Tae Kim,Sung Woong Yang,Jina Jung,Wonchang Choi,Seonu Kim,Rajendra Kumar Gunasekaran,Seok Beom Kang,Kwang Heo,Dong Hoe Kim,Jaeyeong Heo,Sangwook Lee
标识
DOI:10.1016/j.jechem.2023.09.023
摘要
Carbazole moiety-based 2PACz ([2-(9H-carbazol-9-yl)ethyl]phosphonic acid) self-assembled monolayers (SAMs) are excellent hole-selective contact (HSC) materials with abilities to excel the charge-transfer-dynamics of perovskite solar cells (PSCs). Herein, we report a facile but powerful method to functionalize the surface of 2PACz-SAM, by which reproducible, highly stable, high-efficiency wide-bandgap PSCs can be obtained. The 2PACz surface treatment with various donor number solvents improves assembly of 2PACz-SAM and leave residual surface-bound solvent molecules on 2PACz-SAM, which increases perovskite grain size, retards halide segregation, and accelerates hole extraction. The surface functionalization achieves a high power conversion efficiency (PCE) of 17.62% for a single-junction wide-bandgap (∼1.77 eV) PSC. We also demonstrate a monolithic all-perovskite tandem solar cell using surface-engineered HSC, showing high PCE of 24.66% with large open-circuit voltage of 2.008 V and high fill-factor of 81.45%. Our results suggest this simple approach can further improve the tandem device, when coupled with a high-performance narrow-bandgap sub-cell.
科研通智能强力驱动
Strongly Powered by AbleSci AI