Directional Crystallization by Floating Self-Assembly for Efficient and Stable Tin-based Perovskite Solar Cells

被引:29
作者
Yang, Jia [1 ]
Sheng, Wangping [1 ]
Xiao, Shuqin [1 ]
Liu, Gengling [1 ]
Lin, Zhuojia [1 ]
Tan, Licheng [1 ]
Chen, Yiwang [1 ,2 ]
机构
[1] Nanchang Univ, Coll Chem, Inst Polymers & Energy Chem IPEC, Nanchang 330031, Jiangxi, Peoples R China
[2] Jiangxi Normal Univ, Coll Chem, Inst Adv Sci Res iASR, Key Lab Funct Small Mol,Minist Educ, Nanchang 330022, Jiangxi, Peoples R China
基金
中国国家自然科学基金;
关键词
HALIDE PEROVSKITES; THIN-FILMS; HETEROJUNCTION; PERFORMANCE; STABILITY; QUALITY; IODIDE; ACID;
D O I
10.1021/acs.chemmater.0c04906
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
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 similar to 3000 h storage under light soaking.
引用
收藏
页码:4362 / 4372
页数:11
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