Proceedings of MATSUS Fall 2023 Conference (MATSUSFall23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.241
Publication date: 18th July 2023
Hybrid halide perovskite has established its credibility as high performance thin film photovoltaic technology. In only one-decade, the hybrid organic-inorganic halide perovskite solar cell achieved to compete with all mature crystalline technologies, by reaching a certified 25.7 % power conversion efficiency (PCE) on cells and 17.9 % PCE on small modules.[1] Perovskite’s strength stem from their remarkable opto-electronic properties. However, the technology still requires significant considerations regarding stability. Rapid structural and electronic degradation can be engendered when exposed under various external stressors (temperature [2-3], humidity [4-6], light [7-8], electrical bias [9]).
To cope with the stability issue, it is mandatory to precisely understand the multiple degradation pathways of the perovskite. In situ or operando characterization techniques are central characterization tools in order to clarify the different degradation pathways. In this communication, we will be discussing the degradation of different perovskite composition on the basis of humidity or temperature-controlled in situ x-ray diffraction and corroborated with in situ electron spin resonance spectroscopy and in situ transmission electron microscopy. For example, one key finding which we will discuss is that α-FAPbI3 degradation is substantially accelerated when temperature is combined to illumination and when it is interfaced with the extraction layers, and, second the existence of a temperature gap region which takes place only under illumination involving an intermediate stage between the thermal-induced perovskite degradation and the formation of PbI2 by-product. [10]
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