InxGa1−xAs Schottky diode grown by liquid phase epitaxy
Abstract
InxGa1−xAs epilayer was grown on semi-insulating GaAs substrate using Liquid Phase Epitaxy (LPE). Through X-ray Diffractometry (XRD) the calculated Indium mole fraction is approximately 0.017. The thickness of the grown film was measured using Scanning Electron Microscopy (SEM) and was found out to be 8 μm. Schottky photodiode with 250 μm diameter mesa was fashioned from the grown epilayer. Titanium-Gold (Ti/Au) Schottky top contact and Gold-Germanium (Au/Ge) ohmic bottom contact was deposited onto the sample. The responsivity measurement of the fabricated device shows a peak at wavelength 8700 Å, which corresponds to a responsivity value of 0.4 A/W.