Near-infrared organic photodetectors (NIR OPDs) have attracted considerable attention as next-generation energy devices because of their low-cost fabrication, low-weight, and ease of fabrication using a solution process. In this study, organic bulk he...
Near-infrared organic photodetectors (NIR OPDs) have attracted considerable attention as next-generation energy devices because of their low-cost fabrication, low-weight, and ease of fabrication using a solution process. In this study, organic bulk heterojunction (BHJ) photodetectors were fabricated and OPDs were fabricated by mixing a Near-infrared (NIR)-absorbing conjugated polymer Diketopyrrolopyrrole (DPP) electron donor and electron acceptor. The photoelectric effect was compared and analyzed by comparing the fullerene (PC71BM) and non-fullerene (ITIC) conjugated single molecule as an electron acceptor. Through electrical and morphological analysis, the characteristics of NIR organic photoelectric devices that vary depending on the electron acceptor are compared. The results presented here demonstrate that utilizing a non-fullerene acceptor for BHJ-type NIR OPDs is evidently a strategic approach for the simultaneous achievement of the low dark current and high-detectivity of NIR OPDs.