Spectrally Selective Polarization-Sensitive Photodetection Based on a 1D Lead-Free Hybrid Perovskite Ferroelectric

Abstract

Green, self-powered, flexible, and tunable features have been greatly desired to satisfy the increasing demands for next-generation photodetectors and sensors. Here, we report a 1D lead-free perovskite ferroelectric HDA-BiI5 (HDA = hexane-1,6-diammonium) based photodetector showing a spectrally selective linear polarized light response due to a unique linear dichroic conversion behavior. The HDA-BiI5 single crystal device shows an orthogonal reverse of polarization-sensitive photocurrent and can distinguish linearly polarized light in different wavelength ranges with the photocurrent anisotropy ratio ω of about 1.37 at 405 nm, 1.00 at 490 nm, and 1.17 at 530 nm. Importantly, the device achieves a ferroelectricity-driven self-powered detection with an excellent ω (∼1.28 at 405 nm) and a high detectivity D* of 5.3 × 108 Jones. This research provides a pathway for the design of future integratable polarization-sensitive photodetectors.