Interfacial Pyro‐Phototronic Effect: A Universal Approach for Enhancement of Self‐Powered Photodetection Based on Perovskites with Centrosymmetry

Abstract Utilizing the pyro‐phototronic effect presents a potent approach to augment the efficacy of self‐powered photodetectors (PDs) that rely on metal halide perovskites (MHPs). Nevertheless, the pyro‐phototronic effect has thus far been restricted to perovskites possessing a non‐centrosymmetric crystal structure, limiting their scope of application. This study introduces a universal interfacial pyro‐phototronic effect (IPPE) strategy to MHP single crystals with centrosymmetry. The utilization of heterojunctions or Schottky junctions has resulted in the observation of typical four‐stage photoresponses with rapid speed, thereby significantly enhancing the performance of self‐powered PDs and expanding the spectral response range. The contact conditions, such as the choice of metals and surface smoothness, have an important impact on IPPE. The IPPE approach is a versatile technique that can be employed to fabricate self‐powered PDs based on diverse 3D and 2D perovskites. This study broadens the utilization of the pyro‐phototronic phenomenon in centrosymmetric perovskites, which offer advantages in producing optoelectronic devices with superior performance.