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(a) Schematic structure of the Schottky photodiodes on AlN/sapphire template; (b) XRD rocking curves of the (0002) and omega scans for layers.
curves of the Schottky photodiode taken in the dark and under illumination.
(a) and dependences of the Schottky photodiode; (b) carrier concentration profile determined by measurements.
(a) Photocurrent spectra taken under different illumination power densities; (b) spectral responsivity of the Schottky photodiode biased at 0, , and . The responsivity, , is obtained from , where is the photocurrent and is the illumination power density.
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