Fig. 2

Basic optical response characteristics of PRM. a Ultraviolet-visible absorption spectra of device. b The response of the device to light at different wavelengths. c Different threshold switching voltages of devices under optical control. SET electrical compression is written as “S”, and Reset voltage is abbreviated as “R”, where S1-R9 represents one set of I-V curves S1 is the on voltage, and R9 is the corresponding off voltage. d The I–V curve for 100 cycles under VSTM Model. e The I-V curve for 100 cycles under NVM Model. f The distribution of 100 groups of switching voltages (Vth₁ and Vth₂) extracted from (d). g The distribution of 100 groups of SET voltages (Vth₁ and Vth₂) extracted from (d). h The distribution of 100 groups of HRS and LRS extracted from (d). i The distribution of 100 groups of HRS and LRS extracted from (e). j Energy band diagram of the graphene/ZnO under light irradiation