结晶
钙钛矿(结构)
材料科学
带隙
能量转换效率
开路电压
溶剂
相(物质)
化学工程
光伏系统
光电子学
电压
有机化学
化学
生态学
物理
量子力学
工程类
生物
作者
Xinpeng Zhang,Xiangyu Li,Lei Tao,Zemin Zhang,Hao Ling,Xue Fu,Shibo Wang,Min Jae Ko,Jingshan Luo,Jiangzhao Chen,Yuelong Li
出处
期刊:Small
[Wiley]
日期:2023-03-04
卷期号:19 (22)
被引量:26
标识
DOI:10.1002/smll.202208289
摘要
Wide-bandgap perovskite solar cells (PSCs) have attracted a lot of attention due to their application in tandem solar cells. However, the open-circuit voltage (VOC ) of wide-bandgap PSCs is dramatically limited by high defect density existing at the interface and bulk of the perovskite film. Here, an anti-solvent optimized adduct to control perovskite crystallization strategy that reduces nonradiative recombination and minimizes VOC deficit is proposed. Specifically, an organic solvent with similar dipole moment, isopropanol (IPA) is added into ethyl acetate (EA) anti-solvent, which is beneficial to form PbI2 adducts with better crystalline orientation and direct formation of α-phase perovskite. As a result, EA-IPA (7-1) based 1.67 eV PSCs deliver a power conversion efficiency of 20.06% and a VOC of 1.255 V, which is one of the remarkable values for wide-bandgap around 1.67 eV. The findings provide an effective strategy for controlling crystallization to reduce defect density in PSCs.
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