Organic Dye Based Longer Wavelength Photodetector for Narrowband Application

The narrowband red-light photodetectors are highly needed selective-color imaging and multi-output visible light communication (VLC). Several organic dyes are being explored for selective narrowband applications in the visible region; its application has yet to be explored in different areas. We have reported a low-cost solution-processed metal oxide (ZnO)-based photodetector. The study is being carried out under white and red lights. When organic dye material is being used on the top of the device and it shows a positive effect under red illumination. This device structure gives the 11.7nA photo-current under red-light, while bare ZnO is highly insensitive toward the red spectrum. The functionality of the device structure is checked under white light (one sun) and found an enhancement of 1.8pA. This work demonstrates narrow band optoelectronic application using organic dye with a low-cost solution-processed metal oxide.