Organic Photodetectors: Materials, Structures, and Challenges

Owing to its advantages of solution processing, lightweight, low cost, and mechanical flexibility, organic photodetectors (OPDs) have attracted great interest and become a new member of the photodetector (PD) family. Currently, OPDs have made considerable progress and can be compared with traditional PDs in some aspects. They present potential applications in portable and wearable devices. However, there are still some issues that need to be overcome, and there is much room for new development. Herein, the significant advances of OPDs are summarized and discussed, and the future for OPDs is prospected from the aspects of materials, structures, and applications. This essay can inspire new ideas for developing innovative high‐performance OPDs and exploring their practical applications. Herein, the significant advances and the challenges of organic photodetectors (OPDs) are introduced, discussed, and prospected, in terms of materials, structures, and applications. OPDs can find applications in health monitoring, biomedical imaging, flexible wearable devices, and optical communication, among other areas.