Abstract The J-V characteristics of perovskite-based solar cells were measured under selective irradiation in three different domains of the solar spectrum: blue, red and near infrared (NIR). It was found out that even in the inert atmosphere a long-term exposure to both blue and red sources leads to formation of PbI2, but in the former case the degradation of hybrid perovskite is greater due to further photolysis of PbI2. Consequently, the cell performance under illumination with the red light decreases insignificantly. The NIR irradiance improves the perovskite stoichiometry so that the photovoltaic parameters of the cells increase with the exposure time. These features are undistinguishable under continuous sunlight. Therefore, the wavelength-selective J-V measurements piece together the jigsaw of light-induced degradation of hybrid perovskites and open new strategies for the improvement of the device stability.

中文翻译：

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钙钛矿基太阳能电池的波长选择性降解

摘要 在太阳光谱的三个不同区域（蓝色、红色和近红外 (NIR)）选择性照射下，测量了钙钛矿基太阳能电池的 JV 特性。研究发现，即使在惰性气氛中，长期暴露于蓝色和红色源也会导致 PbI2 的形成，但在前一种情况下，由于 PbI2 的进一步光解，杂化钙钛矿的降解更大。因此，在红光照射下的电池性能下降不明显。NIR 辐照度改善了钙钛矿的化学计量，因此电池的光伏参数随着曝光时间的增加而增加。这些特征在持续的阳光下是无法区分的。所以，