Exploring Red, Green, and Blue Light‐Activated Degradation of Perovskite Films and Solar Cells for Near Space Applications,Solar RRL

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Exploring Red, Green, and Blue Light‐Activated Degradation of Perovskite Films and Solar Cells for Near Space Applications
Solar RRL ( IF 6.0 ) Pub Date : 2019-12-23 , DOI: 10.1002/solr.201900394
Wei Xiao ₁ , Jianming Yang ₁ , Shaobing Xiong ₁ , Danqin Li ₁ , Yanqing Li ₂ , Jianxin Tang ₂ , Chungang Duan _{1,

3} , Qinye Bao _{1,

3,

4}

Affiliation

Hybrid perovskite solar cells with a high specific power have great potential to become promising power sources mounted on spacecrafts in space applications. However, there is a lack of study on their photostability as light absorbers in those conditions. Herein, the stability of the perovskite films and solar cells under red, green, and blue (RGB) light illumination in medium vacuum that belongs to near space is explored. The perovskite active layers exhibit different degradations from morphological, chemical, and structural points of view. This is attributed to the strong coupling between photoexcited carriers and the crystal lattice and the diversity of RGB light absorption in the perovskite films. Device characterizations reveal that the efficiency loss of perovskite solar cells results from not only perovskite degradation, but also the photoexcited carriers reducing the energy barrier of ion migration and accelerating the migration to generate more deep‐level trap defects. Moreover, comparative devices suggest that the well encapsulation can weaken the effect of vacuum on stability.

中文翻译：

探索用于近空间应用的钙钛矿薄膜和太阳能电池的红色，绿色和蓝色光活化降解

具有高比功率的混合钙钛矿太阳能电池具有巨大的潜力，有可能成为航天应用中安装在航天器上的有前途的电源。然而，在这些条件下，对于它们作为光吸收剂的光稳定性没有研究。在本文中，探索了属于近空间的中等真空中钙钛矿薄膜和太阳能电池在红色，绿色和蓝色（RGB）光照下的稳定性。从形态，化学和结构的观点来看，钙钛矿活性层表现出不同的降解。这归因于光激发载流子与晶格之间的强耦合以及钙钛矿膜中RGB光吸收的多样性。器件表征表明，钙钛矿太阳能电池的效率损失不仅是钙钛矿降解引起的，而且光激发载流子降低了离子迁移的能垒，并加速了迁移，从而产生了更深层的陷阱缺陷。此外，比较装置表明，孔的封装可以削弱真空对稳定性的影响。

更新日期：2019-12-23

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