材料科学
开尔文探针力显微镜
晶界
钙钛矿(结构)
俘获
放松(心理学)
降级(电信)
粒度
工作职能
导电原子力显微镜
原子力显微镜
电流(流体)
化学物理
凝聚态物理
分析化学(期刊)
化学工程
纳米技术
复合材料
热力学
微观结构
心理学
生态学
社会心理学
电信
物理
图层(电子)
计算机科学
工程类
生物
化学
色谱法
作者
Bich Phuong Nguyen,Gee Yeong Kim,William Jo,Byeong Jo Kim,Hyun Suk Jung
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2017-07-14
卷期号:28 (31): 315402-315402
被引量:24
标识
DOI:10.1088/1361-6528/aa727e
摘要
The electrical properties of CH3NH3Pb(I1−xBrx)3 (x = 0.13) perovskite materials were investigated under ambient conditions. The local work function and the local current were measured using Kelvin probe force microscopy and conductive atomic force microscopy, respectively. The degradation of the perovskite layers depends on their grain size. As the material degrades, an additional peak in the surface potential appears simultaneously with a sudden increase and subsequent relaxation of the local current. The potential bending at the grain boundaries and the intragrains is the most likely reason for the change of the local current surface of the perovskite layers. The improved understanding of the degradation mechanism garnered from this study helps pave the way toward an improved photo-conversion efficiency in perovskite solar cells.
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