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

来源：

CHEMISTRY OF MATERIALS | 2021年 / 33卷 / 12期

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

页码：4362 / 4372

页数：11

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