材料科学
卤化物
钙钛矿(结构)
反向偏压
扩散
理论(学习稳定性)
降级(电信)
量子隧道
化学物理
光电子学
化学工程
无机化学
物理
热力学
计算机科学
二极管
工程类
机器学习
化学
电信
作者
Andrea R. Bowring,Luca Bertoluzzi,Brian C. O’Regan,Michael D. McGehee
标识
DOI:10.1002/aenm.201702365
摘要
Abstract The future commercialization of halide perovskite solar cells relies on improving their stability. There are several studies focused on understanding degradation under operating conditions in light, but little is known about the stability of these solar cells under reverse bias conditions. Reverse bias stability is important because shaded cells in a module are put into reverse bias by the illuminated cells. In this paper, a phenomenological study is presented of the reverse bias behavior of halide perovskite solar cells and it is shown that reverse bias can lead to a partially recoverable loss in efficiency, primarily caused by a decrease in V OC . A general mechanism is proposed, supported by drift–diffusion simulations, to explain how these cells breakdown via tunneling caused by accumulated ionic defects and suggests that the reversible loss in efficiency may be due to an electrochemical reaction of these defects. Finally, the implications of these phenomena are discussed and how they can possibly be addressed is also discussed.
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