Modulating MAPbI3 perovskite solar cells by amide molecules: Crystallographic regulation and surface passivation

• 作者: Jin Xie Ziren Zhou Hongwei Qiao Mengjiong Chen Lijie Wang Shuang Yang Yu Hou Huagui Yang
• 来源期刊: 能源化学
• 年，卷（期）: 2021,（5）
• 页码范围: 179-185
• 页数: 7页
• 语种: 英文

摘要

A controllable crystallization is of practical importance to produce high-quality perovskite thin films with reduced structural defects.Lewis bases as electron-pair donor chemicals can strongly coordinate to lead ions and have been extensively employed to manipulate the growth of perovskite crystals.In this work,we demonstrate a series of Lewis-base amides,for morphological regulation of methylammonium lead triiodide (MAPbI3) thin films.The screened acetamide was demonstrated to decently improve the grain size,along with a spatial distribution at grain boundaries (GBs).The mesostructured solar cells of acetamide-modified absorbers yielded an optimized power conversion efficiency (PCE) of 20.04％ with a mitigated open-circuit voltage (Voc) deficit of 0.39 V.This work provides a facile and cost-effective strategy toward controllable fabrication of high-performance MAPbl3 solar cells.