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(a) Current–voltage characteristics of a heterostructure measured at room temperature in the dark and under UV light irradiation with a light power of ; (b) UV light irradiance dependence of the open-circuit voltage (left) and the short-circuit current density (right).
Spectral response of .
Possible energy-level diagrams for the heterostructure in the dark (left) and under UV light irradiation (right).
(a) Bias voltage dependence of in the dark, measure at an ac frequency of ; (b) injected surface charge density as a function of UV light irradiance.
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