Surface analytical investigation on stability of perovskite solar cell material (Conference Presentation)

Organic-inorganic halide perovskites have attracted considerable attention in the past few years because of their remarkable performance in optoelectronic devices. However, long-term stability of the materials and devices remains the biggest challenge for realistic implementation of perovskite solar cells. Although significant efforts have been carried out on the causes of degradation at the device level, yet few measurements have been made at the surface analytical level to reveal the degradation mechanisms. I’ll present our work on the effects of environmental factors, such as O2, water, and light, on the perovskite layer by monitoring the intrinsic electronic structure and compositional changes in different aging tests. This work contributes in developing better understanding of the degradation mechanisms to improve the overall stability of perovskite light emitting diodes and solar cells.