材料科学
钙钛矿(结构)
兴奋剂
钝化
无定形固体
图层(电子)
能量转换效率
氧化物
电子迁移率
光电子学
复合数
纳米技术
复合材料
化学工程
冶金
工程类
化学
有机化学
作者
Linghui Zhang,Chao Fu,Shi Wang,Minhuan Wang,Ruiting Wang,Shengling Xiang,Zhiyong Wang,Jing Liu,Hongru Ma,Yudi Wang,Ying Yan,Min Chen,Lei Shi,Qingshun Dong,Jiming Bian,Yantao Shi
标识
DOI:10.1002/adfm.202213961
摘要
Abstract Flexible perovskite solar cells (f‐PSCs) show great promise in portable‐power applications (e.g., chargers, drones) and low‐cost, scalable productions (e.g., roll‐to‐roll). However, in conventional n–i–p architecture f‐PSCs, the low‐temperature processed metal oxide electron transport layers (ETLs) usually suffer from high resistance and severe defects that limit the power conversion efficiency (PCE) improvement of f‐PSCs. Besides the enhancement in the mobility of metal oxide and passivation for perovskite/ETL interfacial defects reported in previous literature, herein, the electron transport loss between the metal oxide nanocrystallines within the ETL is studied by introducing an amorphous F‐doped TiO x (F‐TiO x ) caulked crystalline SnO 2 composite ETL. The F‐TiO x in this novel composite ETL acts as an interstitial medium between adjacent SnO 2 nanocrystallines, which can provide more electron transport channels, effectively passivate oxygen vacancies, and optimize the energy level arrangement, thus significantly enhancing the electron mobility of ETL and reducing the charge transport losses. The composite ETL‐based f‐PSCs achieve a high PCE of 22.70% and good operational stability. Furthermore, a moderate roughness of the composite ETL endows f‐PSCs with superior mechanical reliability by virtue of a strong coupling at the ETL/perovskite interface, by which the f‐PSCs can maintain 82.11% of their initial PCE after 4000 bending cycles.
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