MCUT Research

Small/ 2025, vol. 21, p. 2411623

Highly efficient indoor perovskite solar cells with 40% efficiency using perylene diimide‐based zwitterionic cathode interlayers

Main authors: Beata Łuszczyńska, Ireneusz Kownacki, Chih‐Ping Chen: AMU/ Lodz University of Technology (Polland)/MCUT(Taiwan)

Metal halide perovskites are promising for indoor photovoltaics, but low-light non-radiative recombination limits performance. Here, microwave-synthesized PDI-based sulfobetaine cathode interlayers with longer alkyl chains improved stability, conductivity, and cathode work-function tuning. The best material, PDI-C5-S3, delivered 19.04% PCE under one sun and 40.72% at 1000 lux LED. (論文連結)

These results suggest that near-future indoor perovskite photovoltaics will achieve higher efficiency, lower recombination losses, and better operational stability through tailored cathode interlayers. Such advances could accelerate practical use in self-powered IoT sensors, wearable electronics, and smart indoor devices, while guiding further molecular design for scalable, low-light energy harvesting.