Abstract
Broadband photodetectors have a wide range of applications in the fields of biomedical sensing, environmental monitoring, optical communications, and space exploration. Since light absorbed by MAPbX(3) perovskite materials is mainly located within the visible light region, the detection range of perovskite photodetectors is limited. To broaden the detection range for these types of photodetectors and, thus, enhance the number of possible application scenarios, a non-fullerene acceptor Y6 is introduced that strongly absorbs light in the near-infrared band and alongside PM6 forms an organic bulk heterojunction. This results in the expansion of the absorption range due to the formation of a supplementary absorption layer onto the perovskite layer. In this paper, the effects of the newly introduced organic layer on the device performance are studied. Through the synergistic effects of the perovskite and the organic layer, a high-performance self-powered perovskite/organic hybrid broadband photodetector can be realized, which contains a wide detection range from ultraviolet and visible light to near-infrared (300-1000 nm). After its optimization, the device exhibits a high external quantum efficiency value that is as high as 80% in the visible-near-infrared band, a short response time in the region of 803/698 ns, and a large linear dynamic range of 143 dB.