Investigating Performance Limitations in Cost-Effective Materials for Perovskite Solar Cells Prof. Marumoto

The researchers at University of Tsukuba employed ESR to investigate the underlying mechanisms for the performance limitations of perovskite solar cells incorporating HND-2NOMe, focusing on the material’s internal properties at a microscopic scale. They discovered that in the absence of illumination, holes migrate from perovskite to HND-2NOMe, forming an energetic barrier at the perovskite/HND-2NOMe interface. This barrier impedes hole flow, leading to performance limitations. Furthermore, solar cells incorporating HND-2NOMe demonstrate reduced hole accumulation under solar irradiation, which contributes to the stability of the hole transport function.

Identifying the factors responsible for performance limitations while maintaining stable functionality represents a substantial breakthrough with important implications for formulating fabrication guidelines aimed at enhancing device performance. Furthermore, the aforementioned findings will serve as a valuable foundation for advancing future research and development in perovskite solar cell technologies.