材料科学
纳米技术
纳米晶
太阳能电池
氧化物
光伏系统
化学工程
降级(电信)
氧气
化学
光电子学
冶金
有机化学
电信
生物
工程类
计算机科学
生态学
作者
David Becker‐Koch,Miguel Albaladejo‐Siguan,Joshua Kreß,Rhea Kumar,Yvonne J. Hofstetter,Qingzhi An,Artem A. Bakulin,Fabian Paulus,Yana Vaynzof
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:14 (8): 3020-3030
被引量:6
摘要
AgBiS2 nanocrystal solar cells are among the most sustainable emerging photovoltaic technologies. Their environmentally-friendly composition and low energy consumption during fabrication make them particularly attractive for future applications. However, much remains unknown about the stability of these devices, in particular under operational conditions. In this study, we explore the effects of oxygen and light on the stability of AgBiS2 nanocrystal solar cells and identify its dependence on the charge extraction layers. Normally, the rate of oxygen-induced degradation of nanocrystals is related to their ligands, which determine the access sites by steric hindrance. We demonstrate that the ligands, commonly used in AgBiS2 solar cells, also play a crucial chemical role in the oxidation process. Specifically, we show that the tetramethylammonium iodide ligands enable their oxidation, leading to the formation of bismuth oxide and silver sulphide. Additionally, the rate of oxidation is impacted by the presence of water, often present at the surface of the ZnO electron extraction layer. Moreover, the degradation of the organic hole extraction layer also impacts the overall device stability and the materials' photophysics. The understanding of these degradation processes is necessary for the development of mitigation strategies for future generations of more stable AgBiS2 nanocrystal solar cells.
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