There is a new method for stability analysis of perovskite cells

Recently, Professor Luo Jingshan's research group from the Institute of Optoelectronic Thin Film Devices and Technology of Nankai University proposed a unified index for the evaluation of perovskite solar cell stability data under different test conditions for the stability of perovskite solar cells, and conducted statistical analysis of more than 7000 sets of stability data in the open database Perovskite Database, and explored the influence of
different perovskite components and device structures on device stability.

Perovskite solar cells are a new generation of photovoltaic technology with great application prospects, which have received extensive attention from researchers and industry, but their stability problems hinder their commercial application
.
At present, the stability improvement strategy of perovskite solar cells still comes from a single experimental experience, and lacks macroscopic statistical conclusions
based on big data.
Due to the complex degradation process of perovskite, the lack of uniform test standards (temperature, humidity, light, etc.
) and the recording method, it is difficult to directly compare
the published historical data.

Luo Jingshan's team proposed a unified stability description index TS80m based on the acceleration factor concept used in the accelerated aging experiments of organic solar cells and perovskite solar cells, which can normalize the stability data tested under different conditions and recorded in different ways to the same standard
.
According to this index, the 7419 sets of stability data in Perovskite Database were normalized, and the data visualization and statistical analysis were carried out, and the statistical law
of the influence of different perovskite components and device structures on stability was obtained.