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Photoresponse mechanism of reconfigurable MoS2/PdSe2 photodetector: (a) The energy band structure of AHA charge-trap stack and MoS2/PdSe2 heterostructure before contact; (b,c) the energy band structure of the device and the flow of photo-generated electron-holes under illumination when the device is set to erase (VG < 0) and program states (VG > 0), respectively.
