Moisture Stability of Perovskite Solar Cells Processed in Supercritical Carbon Dioxide

Molecules

Gary Tepper¹  Gilbert Annohene¹ 

[1] Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA;

关键词: perovskite;    photovoltaics;    supercritical carbon dioxide;   

DOI  :  10.3390/molecules26247570

来源: DOAJ

【 摘 要 】

Performance degradation under environmental conditions currently limits the practical utility of perovskite-based solar cells. The moisture stability of CH₃NH₃PbI₃ perovskite films and solar cells was measured during exposure to three different levels of relative humidity. The films were crystallized at two different temperatures with and without simultaneous exposure to supercritical carbon dioxide. The film crystallinity, optical absorption, and device photoconversion efficiency was measured over time for three relative humidity levels and both crystallization methods. It was determined that film crystallization in supercritical CO₂ resulted in significant improvement in moisture stability for films processed at 50 °C, but negligible improvement in stability for films processed at 100 °C.

【 授权许可】

Unknown