Chlorosome‐Like Chlorophyll Derivative Aggregates Enabling Self‐Powered Organic Photodetector With Linear/Circular Polarization Sensitivity

ABSTRACT

Integrating sensitivity to both linear and circular polarization within a single device remains highly challenging. Inspired by the polarization vision of mantis shrimp, this study proposes a self‐powered, polarization‐sensitive organic photodetector (OPD) based on zinc methyl 3‐devinyl‐3‐hydroxymethyl‐pyropheophorbide‐ a (Chl) capable of detecting either linearly polarized light (LPL) or circularly polarized light (CPL). In this OPD, Chl self‐assembled into J‐aggregates through spin‐coating process, and worked as the photosensitive layer. Such Chl J‐aggregates exhibit anisotropic absorption both for LPL and CPL, thus the corresponding OPDs exhibit polarization‐dependent photoresponse to LPL and CPL, resulting in a linear polarization ratio of 3.49 and a circular polarization anisotropy factor g _Jph of −0.69. Such superior linear and circular polarization response characteristics endow the OPD with excellent functions of both polarized visual imaging and high‐level secure communications. This study on polarization‐sensitive Chl‐based OPDs opens new avenues for the development of green and sustainable intelligent polarization perception systems.