Abstract
Junction organic photodetectors (OPD) based on the principle of photovoltaic generation have been widely studied. Firstly, this paper introduces the bulk heterojunction OPDs using ZnO for electron transport layer, PC60BM+P3HT for active layer structure, and MoO3 for hole transport layer to improve the photoelectric conversion efficiency. Secondly, the OPD device was prepared by specific experimental scheme, and the advantages of using the polymer-organic small molecular heterojunction were pointed out. Finally, the performance of the device was analyzed, including external quantum efficiency (EQE), responsiveness, specific detectivity, dark current and so on in different bands. Finally, the shortcomings of the device are pointed out, and the improvement scheme and possible improvement direction are put forward to improve the photoelectric conversion efficiency and fabricate high performance organic photodetectors.
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