Department of Applied Physical Sciences, University of North Carolina, Chapel Hill, NC, 27599, USA.
Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA.
Adv Mater. 2019 Jan;31(4):e1805547. doi: 10.1002/adma.201805547. Epub 2018 Nov 28.
Organohalide metal perovskites have emerged as promising semiconductor materials for use as space solar cells and radiation detectors. However, there is a lack of study of their stability under operational conditions. Here a stability study of perovskite solar cells under gamma-rays and visible light simultaneously is reported. The perovskite active layers are shown to retain 96.8% of their initial power conversion efficiency under continuous irradiation of gamma-rays and light for 1535 h, where gamma-rays have an accumulated dose of 2.3 Mrad. In striking contrast, a glass substrate shows obvious loss of transmittance under the same irradiation conditions. The excellent stability of the perovskite solar cells benefits from the self-healing behavior to recover its efficiency loss from the early degradation induced by gamma-ray irradiation. Defect density characterization reveals that gamma-ray irradiation does not induce electronic trap states. These observations demonstrate the prospects of perovskite materials in applications of radiation detectors and space solar cells.
卤化金属钙钛矿作为空间太阳能电池和辐射探测器用半导体材料具有广阔的应用前景。然而，其在工作条件下的稳定性缺乏研究。本文报道了钙钛矿太阳能电池在伽马射线和可见光同时辐照下的稳定性研究。结果表明，在伽马射线累积剂量为 2.3 Mrad 的条件下，经过 1535 h 的连续辐照，钙钛矿活性层保留了初始功率转换效率的 96.8%。相比之下，在相同的辐照条件下，玻璃基底的透光率明显下降。钙钛矿太阳能电池具有优异的稳定性，得益于自修复行为，可以从伽马射线辐照引起的早期降解中恢复其效率损失。缺陷密度表征表明，伽马射线辐照不会诱导电子陷阱态。这些观察结果表明，钙钛矿材料在辐射探测器和空间太阳能电池的应用中有广阔的前景。
