Inderscience Publishers

Investigation of optical parameters of boron doped aluminium nitride films grown on diamond using spectroscopic ellipsometry

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Boron doped aluminium nitride (B)AlN films are prepared on diamond substrate by using a co–sputtering system. The dielectric function of diamond substrate and (B)AlN films with B contents of 0%, 3%, 5% are extracted by using the spectroscopic ellipsometry. Whereas the (B)AlN films having B contents lower than 5% are considered important for improving crystalline and electronic properties of the buffer layers - the films with B contents ≤3%, however, do not cause appreciable changes in its direct bandgaps.

Keywords: BAlN film, boron aluminium nitride, co–sputtering, dielectric function, spectroscopic ellipsometry, diamond substrate, optical parameters

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