National Changhua University of Education Institutional Repository : Item 987654321/13981

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NCUEIR > College of Engineering > eedept > Periodical Articles > Item 987654321/13981

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/13981

Title:	Optical Characterization of ZnMnO Thin Films on c-Al2O3
Authors:	Lin, H. J.;Lin, D. Y.;Wu, Jenq-Shinn;Chou, W. C.;Yang, C. S.;Wang, J. S.;Lo, W. H.
Contributors:	電子工程學系
Keywords:	ZnMnO;X-ray diffraction;Photoluminescence;Reflectance
Date:	2008-07
Issue Date:	2012-09-10T02:34:19Z
Publisher:	Han'guk Mulli Hakhoe
Abstract:	Various optical measurement technologies have been used to characterize ZnMnO thin films with different Mn compositions grown by molecular beam epitaxy (MBE) on c-Al2O3 substrates. The lattice constant and the crystalization quality have been evaluated by using X-ray diffraction (XRD). Photoluminescence (PL) has been used to reveal the neutral-donor-bound exciton (D0X) and to check the film's quality. Defect-related absorption signatures, in addition to near-band-edge absorption, due to the zinc vacancy and the donor-acceptor pair (DAP) have been found in the surface photovoltage spectra (SPS). Free excitonic transitions and their phonon-assisted replicas have been observed in the reflectance spectra. Our experimental results not only unveil specific optical transition energies but also indicate a rapid material deterioration when Mn incorporation goes beyond a certain amount to cause manganese segregation.
Relation:	Journal of the Korean Physical Society, 53(1): 98-101
Appears in Collections:	[eedept] Periodical Articles

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