Organic Photodetectors and Sensors for Low‐Light and Infrared Applications

ABSTRACT Organic sensors and photodetectors (OPDs) have emerged as a potential class of optoelectronic devices. They are capable of detecting light at many different wavelengths, including infrared (IR) and low light. Their special advantages, which open up new possibilities for sensing technologies in the future, include mechanical flexibility, inexpensive processing, and changeable light response. Recent developments in the creation and enhancement of organic semiconducting materials are examined in detail in this article. It emphasizes molecular strategies to enhance stability, light absorption, and charge transfer in low‐light conditions. High detectivity, fast reaction times, and spectrum selectivity are the main goals of the review's discussion of device architectures. It investigates important application domains such wearable and flexible electronics, low‐light environmental sensing, and biomedical imaging. In several domains, OPDs have clear benefits over conventional inorganic technologies. Major issues including long‐term stability, noise reduction, and large‐area integration are also discussed. The review offers ideas for possible solutions utilizing innovative material designs and interface engineering. This paper provides a thorough overview of the state and future trends of OPDs and sensors for low‐light and infrared applications by tying together developments in organic materials chemistry and device physics.