材料科学
钝化
钙钛矿(结构)
锡
晶界
化学工程
能量转换效率
结晶
纳米晶
太阳能电池
纳米技术
微观结构
冶金
光电子学
工程类
图层(电子)
作者
Tengfei Kong,Zhiyong Yang,Xufu Liu,Dongqin Bi
出处
期刊:Small
[Wiley]
日期:2023-12-10
卷期号:20 (13)
被引量:1
标识
DOI:10.1002/smll.202307206
摘要
Tin-lead (Sn-Pb) mixed perovskites is beneficial to a single-junction or all-perovskite tandem device. However, the poor quality of the perovskite surface resulting from Sn2+ oxidation and uncontrollable crystallization degrades device performance and stability. Herein, based on interface engineering, a novel biguanide derivative of PZBGACl is employed that integrates different types of N-related groups to reconstruct the surface/grain boundaries of Sn-Pb perovskite. Combined with the microcorrosion effect of isopropanol solvent, PZBGACl can induce surface recrystallization of perovskite, and passivate various types of defects via hydrogen bond or Lewis acid-base interaction, leading to an excellent perovskite film with reduced stress, larger grain size, and more n-type surface. As a result, the obtained Sn-Pb solar cell achieves a power conversion efficiency of 22.0%, and exhibits excellent N2 storage/operation stability.
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