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

0350300 - ÚFE 2011 RIV NL eng J - Journal Article
Gladkov, Petar - Humlíček, J. - Hulicius, Eduard - Šimeček, Tomislav - Paskova, T. - Evans, K.
Effect of Fe doping on optical properties of freestanding semi-insulating HVPE GaN:Fe.
Journal of Crystal Growth. Roč. 312, č. 8 (2010), s. 1205-1209. ISSN 0022-0248. E-ISSN 1873-5002
R&D Projects: GA AV ČR IAA100100719; GA MŠMT(CZ) LC06040
Institutional research plan: CEZ:AV0Z20670512; CEZ:AV0Z10100521
Keywords : Fe-doping * Optical characterization * Hybride vapor phase epitaxy * Nitrides
Subject RIV: JB - Sensors, Measurment, Regulation
Impact factor: 1.737, year: 2010

Systematic study of optical properties of undoped and Fe-doped substrates grown by hydride vapor phase epitaxy has reveled 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.
Permanent Link: http://hdl.handle.net/11104/0190335