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. 2021 Jun 9;10:123. doi: 10.1038/s41377-021-00551-4

Fig. 2. The relation between the working mechanisms and the configurations of the 2DM PDs.

Fig. 2

Both metal-2DM-metal and metal-2DM+X-metal configurations have a phototransistor structure featuring a 2DM channel. The former has a pure 2DM channel, while the latter has a 2DM channel contacted with another specific material “X”, such as zero-dimensional (0D) quantum dots, 1D carbon nanotubes (CNTs), 2DMs, and even bulk materials. In the 2DM-heterostructure configuration, the electrodes are connected to different materials. PV photovoltaic, IPE internal photon emission, DT direct tunneling, F-N tunneling Fowler-Nordheim (F-N) tunneling, PC photoconductive, PG Photo-gating, BOL bolometric, PTE photo-thermoelectric, QDs quantum dots, CNT carbon nanotubes.