Valence band offset of GaN/diamond heterojunction measured by X-ray photoelectron spectroscopy
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2μm InGaSb/AlGaAsSb strained quantum wells and a tellurium-doped GaSb buffer layer were grown by molecular beam epitaxy(MBE). The growth parameters of strained quantum wells were optimized by AFM, XRD and PL at77 K. The optimal growth temperature of quantum wells is440°C. The PL peak wavelength of quantum wells at300 K is1.98μm, and the FWHM is115 ...
High quality InAs/GaSb type-II band alignment superlattices infrared photodetectors with different InAs thicknesses were grown on GaSb and GaAs substrates by molecular beam epitaxy(MBE). The detection wavelengths of these InAs/GaSb SLs infrared detectors were2-5μm. The material and optical qualities of InAs/GaSb superlattices on different substrate...
We studied the influence of high temperature AlN buffer thickness on the property of GaN film on Si (1 1 1) substrate. Samples were grown by metal organic chemical vapor deposition. Optical microscopy, atomic force microscopy and X-ray diffraction were employed to characterize the samples. The results demonstrated that thickness of high temperature...
High-quality and thick Ge epitaxial films are grown on Si substrates utilizing the low-temperature(LT) buffer technique by ultrahigh vacuum chemical vapor deposition(UHV-CVD) and are characterized by atomic force microscope, X-ray diffraction, and Raman spectroscopy. The results show that the LT Ge buffer is rough due to the three-dimensional islan...