Organic semiconductors offer a formidable technological platform to detect light within a selected wavelength window in the visible range and beyond. This book, the first ever to be published on the subject, provides the most extensive treatment of organic narrowband photodetectors to date, and takes the reader on a journey from the basics to the most advanced developments of this intriguing technology. Introducing the field of organic narrowband photodetectors, discussing the large range of compounds, diverse device configurations, and real-world applications that have been explored, the text also includes the most extensive collection of organic narrowband photodetector performance data ever published. Organic Narrowband Photodetectors is an essential guide and reference for researchers and practitioners in optoelectronics, organic semiconductors, and related fields, as well as technology enthusiasts and students in physics, electronics engineering, chemistry, and materials science.