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Decay kinetic on long time scale of the MSM GaN-based photodetector recorded at different temperatures under bias of . The open symbols are the experimental data and the full lines are the fitting curves.
The Arrhenius plots of the PPC decay time constants (a) and (b) obtained on long time scale. The corresponding activation energies are about and about , respectively.
Photocurrent spectrum of the MSM GaN-based photodetector at RT under bias of 10. Full lines point out the two slope changes in the photocurrent with sharp onset, indicated by the arrows, at and .
(a) Plot of and (b) of vs photon energy. The deep level energies obtained through the linear fits (full lines) are and , respectively.
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