Polymer-Controlled Growth and Wrapping of Perovskite Single Crystals Leading to Better Device Stability and Performance

被引：32
作者：
Saraf, Rohit [1 ]
Mathur, Avi [1 ]
Maheshwari, Vivek [1 ]
机构：
[1] Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem, Waterloo, ON N2L 3G1, Canada
来源：
ACS APPLIED MATERIALS & INTERFACES | 2020年 / 12卷 / 22期
基金：
加拿大自然科学与工程研究理事会; 加拿大创新基金会;
关键词：
crystal growth; perovskite; ion migration effect; photocurrent; long-term stability; optoelectronics; CHARGE-LIMITED CURRENTS; HALIDE PEROVSKITES; ELASTIC PROPERTIES; CROSS-LINKING; SOLAR-CELLS; FILMS; POLYSTYRENE; IMPACT;
D O I：
10.1021/acsami.0c04346
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A commodity-scale polymer is used for controlling the nucleation and growth of single crystals of organolead halide perovskite. The polymer [polystyrene (PS)] cross-links and strongly interacts with PbI(2 )and MAI (MAPbI(3) perovskite precursors) resulting in the control of the crystallization process. The PS concentration modulates the nucleation time, crystal size, and the number of perovskite single crystals. In addition, the PS-based MAPbI(3) crystals show an enhanced performance as well as improved thermal and environmental stability. Specifically, the PS-MAPbI(3) crystals show 3 times higher photocurrent than plain MAPbI(3) crystals and maintain a stable structure for more than 50 days (1200 h) under continuous 0.1 sun illumination in the air with a relative humidity of 40-45%. The improved performance and stability are attributed to the direct interaction between the PS and perovskite, which greatly reduces the ion migration, defect traps, and charge recombination and improves the carrier mobility and lifetime.
引用
收藏
页码：25011 / 25019
页数：9
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