Effect of Fe doping on optical properties of freestanding semi-insulating HVPE GaN:Fe

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Authors

GLADKOV Petar HUMLÍČEK Josef HULICIUS Eduard ŠIMEČEK Tomislav PASKOVA Tanya EVANS Keith

Year of publication 2010
Type Article in Periodical
Magazine / Source Journal of crystal growth
MU Faculty or unit

Faculty of Science

Citation
Field Solid matter physics and magnetism
Keywords Fe-doping; optical characterization; hydride vapor phase epitaxy; nitrides
Description Systematic study of optical properties of undoped and Fe-doped substrates grown by hydride vapor phase epitaxy has revealed a strong dependence of the photoluminescence, transmission, reflectivity and ellipsometric spectra on the Fe-doping level. The changes of the near-band-gap transmission, reflectivity and photoluminescence has been observed and ascribed to the absorption introduced by the density of states tails, and the Fe3+ -ions incorporated in the GaN-lattice. Several approaches towards quantifying the Fe-doping level are suggested.
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