Flexible organic photodetectors and their use in wearable systems

Flexible organic photodetectors that are lightweight, conformable, cost-effective, and compatible with large-scale processing techniques will meet the demands of next-generation wearable devices in the era of Internet of Things (IoT). Recent advances in various flexible organic photodetectors and their accompanied signal processing circuits have greatly enriched the application scenarios of wearable devices. This review provides a comprehensive summary of general design principles for organic photodetectors, addresses the device architecture and signal processing relations, reveals the challenges in improving the performance of flexible device units and their integrated systems, and highlights methodologies in concrete scenarios for precision design and optimization.