"Version: 20191201"--Title page verso.Includes bibliographical references.1. Detecting light in a multispectral world -- 1.1. Introduction -- 1.2. Application areas of narrowband photodetection -- 1.3. Benchmark technologies for narrowband photodetection -- 1.4. Motivation for organic narrowband photodetectors -- 1.5. Summary2. Introduction to organic photodetectors -- 2.1. Phototransduction an…