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	GLADKOV, Petar, Josef HUMLÍČEK, Eduard HULICIUS, Tomislav ŠIMEČEK, Tanya PASKOVA and Keith EVANS. Effect of Fe doping on optical properties of freestanding semi-insulating HVPE GaN:Fe. Journal of crystal growth. Amsterdam: Elsevier Science, 2010, vol. 312, No 8, p. 1205-1209. ISSN 0022-0248.
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.
Related projects:	Physical and chemical properties of advanced materials and structures