Bias‐switchable Dual‐Mode Organic Photodetector with High Operational Stability Using Self‐trapped Cs3Cu2I5 Interfacial layer

Conventional photovoltaic (PV)-photodetectors are hard to detect fainted signals, while photomultiplication (PM)-capable devices indispensable for detecting weak light and are prone to degrade under strong light illumination and large bias, and it is urgent to realize highly efficient integrated detecting system with both PM and PV operation modes. In this work, one lead-free Cs