Narrowband Photodetector by Integrating PTCDI-C13 J-aggregates with Graphene

A narrowband photodetector integrated a sensitive layer of J-aggregates of perylene diimide derivative with a conductive layer of graphene was fabricated and characterized. The conductivities of the hybrid devices under the illumination of light with different wavelength were measured. The results show that this hybrid device is photosensitive to the absorption band of J-aggregates. The conductivity under target light illumination is higher that of darkness. This design concept is generic for other J-aggregates with different absorption windows. It provides a new method to fabricate narrowband photodetector over the range from visible to NIR.