Abstract
We have presented the room-temperature persistent photoconductivity (PPC) effect in γ-InSe layered semiconductors. The PPC effect can be observed in the temperature range from room temperature down to 200 K, and the PPC decay is well described by a stretch-exponential function. The temperature-dependent PPC and performance of PPC decay indicate that the random local-potential fluctuations (RLPF) mechanism is responsible for PPC effect inγ-InSe. In addition, the PPC behavior at different temperature regions can be well explained by the percolation model associated with the RLPF mechanism.
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