Visible to Mid-Infrared Photodetection Based on Flexible 3D Graphene/Organic Hybrid Photodetector with Ultrahigh Responsivity at Ambient Conditions
作者:
Ge, Z (Ge, Zhen) [1] , [2] , [3] ; Xu, N (Xu, Nuo) [1] , [2] , [3] ; Zhu, Y (Zhu, Yu) [1] , [2] , [3] ; Zhao, K (Zhao, Kai) [1] , [2] , [3] ; Ma, YF (Ma, Yanfeng) [1] , [2] , [3] ; Li, GH (Li, Guanghui) [1] , [2] , [3] ; Chen, YS (Chen, Yongsheng) [1] , [2] , [3]
DOI
10.1021/acsphotonics.1c01690
摘要
Near-infrared (NIR) andmid-infrared(MIR) photodetectors have wide applications in biometrics, military, industry, etc. NIR and MIRorganicphotodetectors (OPD) require narrow-bandgap semiconductorstoachieve efficient light absorption. However, it is still a challengetosynthesizeorganicmaterialswithefficient absorption region above 1000 nm. Herein, aflexiblehybridOPD has been designed and fabricated by integratingorganicmaterialswiththree-dimensionalgraphene(3DG) film, and thephotodetectorcan detect light fromvisibletoMIRatroom temperaturewithan outstandingresponsivityof 108 A W-1 in the NIR region (1000 nm). Moreover, thehybriddevice can detect picowatt-level lightwithultrahighresponsivityof 5.8 x 10(5) A W-1 and specific detectivity of 3 x 10(15) Jones in thevisibleregion. Furthermore, the 3DG film/organichybriddetector is well compatiblewithflexiblesubstrates and opens up a novel approachtodevelopingflexiblephotodetectorswithhighresponsivityin a wide spectrum range, suggesting possible potential applications inflexibleelectronics.
