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. 2021 Oct 12;11(10):2688. doi: 10.3390/nano11102688

Figure 3.

Figure 3

Photogating Effect. (a) Schematic of the graphene–quantum dot hybrid phototransistor. (b) Illustration of the interface charge distribution between nanoparticles and graphene. (c) Transfer characteristics of graphene transistors with or without the addition of PbS QDs on the graphene film. Inset: Energy diagram of the heterojunction of PbS QD and graphene. (d) Transfer characteristics of a PbS QDs/graphene transistor characterized under different light irradiation with the wavelengths of 895nm. (a) Reproduced with permission from [19]. Copyright Nature Publishing Group, 2012. (b) Reproduced with permission from [53]. Copyright Nature Publishing Group, 2017. (c,d) reproduced with permission from [52]. Copyright Wiley, 2012.