（1. National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China) （2. University of Chinese Academy of Sciences, Beijing 100049, China)
Polarized photodetectors have the ability to detect the direction of the light field vector, which can greatly enrich the information dimension of photoelectric detection and expose hidden information that cannot be found in traditional detection methods. Therefore, it is important in target detection, geological remote sensing, machine vision, etc. Using the intrinsic anisotropy of the material structure to achieve the polarization response helps to avoid the complex structure and huge system caused by the traditional polarization detection that requires coupling optical elements, and contribute to realize the miniaturization and integration of the device. Here, we have constructed an organic polarization detector based on a large-area organic semiconductor two-dimensional single-crystal film. Using the long-range order and intrinsic anisotropy of the molecular structure in the organic single-crystal film, we have obtained the polarized light response characteristic with a high linear dichroic ratio as large as 2.39. Furthermore, using the order and orientation consistency of the molecular stacking structure of the large-area organic two-dimensional single-crystal film in the large-scale range, a 4×4 polarization photodetector array was fabricated. The polarization directions of all devices are consistent, showing a good consistency. The characteristics and uniformity indicate its potential application in the integration of large-area polarization devices.