Organic Semiconductor‐Based Polarized Photodetectors for Next‐Generation Optoelectronics

Abstract When light interacts with diverse media via reflection, transmission, and scattering, its polarization state alters, encoding the spectral information specific to the object's features. With advancements in the smart era, polarization detection is progressing toward miniaturization, integration, and enhanced multifunctionality, where polarization‐sensitive active layers are pivotal. Organic semiconductors—featuring chemically tailored photoelectric properties and precisely engineered optical anisotropy, as well as cost‐effectiveness and flexibility—emerge as promising candidates for next‐generation polarized‐light detection. This review highlights the cutting‐edge progress of organic‐semiconductor–based photodetectors in polarization‐sensitive detection. Beginning with a brief introduction to polarization detection, it then summarizes recent developments in organic materials sensitive to linear and circular polarization light, specifically focusing on organic single crystals and aligned conjugated polymers for linear polarization detection; chiral small molecules, chiral conjugated polymers, and chiral supramolecules for circular polarization detection. Advanced applications of these materials, including polarization imaging, biomimetic vision, and information encryption are subsequently discussed. The review concludes by highlighting the prevailing challenges and outlining future research directions essential for advancing high‐performance, integrated polarization‐sensitive photodetectors in this rapidly evolving field.