(a) Schematic diagram of the exfoliated β-Ga₂O₃ flake based MSM solar-blind photodetector with graphene electrodes. I–V characteristics of the fabricated solar-blind MSM photodetectors in the dark and under light illumination at different conditions (254 nm or 365 nm): (b) with Ni/Au contacts and (c) with graphene contacts. Time-dependent photoresponse of the exfoliated β-Ga₂O₃ flake based MSM solar-blind photodetectors under 254 nm or 365 nm light illumination (d) with Ni/Au contacts and (e) with graphene contacts.^[30]