题目： | Stopping Phase Separation Enables Durable Wide-Bandgap Photovoltaic Perovskites |
作者： | Xiao-Ying He1, Bin Song1, Kai-Li Wang1*, Nan Li1, Lei Huang1, Rui-Hao Qin1, Jing Chen1, Chun-Hao Chen1, Yu Xia1, Ilhan Yavuz2, Yan-Hui Lou1* and Zhao-Kui Wang1* |
单位： | 1State Key Laboratory of Bioinspired Interfacial Materials Science, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China. 2Department of Physics, Marmara University, Ziverbey 34722, Türkiye. |
摘要： | Light-induced halide segregation presents a fundamental barrier to the longevity of wide-bandgap (WBG) mixed-halide perovskites. Herein, a multifunctional ionic polymer, polyquaternium-37, is reported as an effective grain boundary passivator to inhibit the degradation pathway. This dual-interaction mechanism concertedly arrests halide migration at grain boundaries, thereby suppressing local electric-field and ultimately curbing light-induced phase separation. Consequently, the modified WBG perovskites demonstrate robust photostability under light stress. The champion inverted perovskite photovoltaic device delivers a power conversion efficiency (PCE) of 22.86% under AM 1.5G illumination and an outstanding indoor PCE of 43.19% under 1000 lux. Remarkably, the modified device exhibits a projected T90 lifetime exceeding 10 000 h under continuous indoor light cycling. This work pioneers a facile solution to halide segregation via grain boundary engineering, paving the way for operationally stable WBG perovskite photovoltaics. |
影响因子： | 27.4 |
分区情况： | 一区 |
链接： |
责任编辑：郭佳