A Novel Lead‐Free Perovskite Cs <sub>2</sub> CuBr <sub>4</sub> /Cs <sub>3</sub> Bi <sub>2</sub> Br <sub>9</sub> Bulk Heterojunction as Self‐Powered Photodetectors: Effect of Precursor Ratios on Photoresponse Behavior
In recent years, the demand for efficient and sustainable photodetectors has significantly increased due to their critical role in optical sensing, communication, and imaging ap...