Optimized perovskite photodetector achieved through optical manipulation via biomimetic nanostructure

Abstract

Photodetectors with high integration and detectivity are in great demand for the development of wearable and flexible electronic devices. However, the limited photoelectric conversion efficiency at low film thickness has significantly hindered further applications for both traditional semiconductors and newly emerged perovskite materials. In this study, we have incorporated a biomimetic nanostructure inspired by the lotus leaf onto the perovskite active layer using a modified two-step room temperature low-pressure nanoimprinting technique. This approach has greatly improved the quality of the perovskite material during the spatially limited crystallization process. By incorporating a biomimetic optical nanostructure, we have achieved a synergistic effect between enhanced scattering and local surface plasmon resonances, leading to a significant improvement in incident light utilization efficiency. With the incorporation of this biomimetic nanostructure, we observed a remarkable enhancement of 1100% in photogenerated current and 39.6% in response speed. This strategy provides a viable approach for designing high-efficiency ultra-thin photodetectors.