材料科学
二亚胺
苝
结晶
钙钛矿(结构)
化学工程
锡
纳米技术
导电体
能量转换效率
光伏系统
光电子学
分子
化学
复合材料
电气工程
有机化学
冶金
工程类
作者
Jia Yang,Wangping Sheng,Shuqin Xiao,Gengling Liu,Zhuojia Lin,Licheng Tan,Yiwang Chen
标识
DOI:10.1021/acs.chemmater.0c04906
摘要
Tin-based perovskite materials have attracted intensive research due to its environmental friendliness and tremendous potential in the photovoltaic field. However, the extremely poor crystalline quality and awful stability of tin-based perovskite have restricted the further improvement in optoelectronic performance. Herein, a novel strategy of crystal orientate manipulation is proposed by introducing a self-assembly molecule, fluorinated-perylene diimide (F-PDI), which provides an external driving force to guide the orientated crystallization of perovskite in the vertical direction, and thus greatly promotes the effective transmission of carriers. The conductive F-PDI simultaneously serves as defect passivator and hydrophobic barrier layer, which boosts the photoelectric performance and contributes to the lattice robustness. As a result, the unencapsulated device based on F-PDI achieves considerable power conversion efficiency (PCE) of 9.49% and exhibits remarkable long-term stability, maintaining over 80% of its original efficiency after ∼3000 h storage under light soaking.
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