Interfacial Recombination for Fast Operation of a Planar Organic/QD Infrared Photodetector

Abstract

A planar infrared photodetector consisting of discrete films of PbS quantum dots (QDs) and the fullerene derivative, PCBM, is reported. A fast recombination process at the PbS QD/PCBM interface enables an improvement in the response speed of greater than two orders-of-magnitude over devices consisting only of the QD film. The physical processes governing device operation and performance are explored.