Journal
JOURNAL OF LUMINESCENCE
Volume 87-9, Issue -, Pages 1140-1142Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0022-2313(99)00570-0
Keywords
titanium dioxide; anatase TiO2; self-trapped exciton
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Anatase single crystals were grown by chemical vapor transport method. As-grown crystal with blue color was annealed in oxygen atmosphere. The crystal changes its color to yellow or colorless depending on the annealing. A broad luminescence band at around 2.3 eV was observed in as-grown and annealed anatase, but the line shape is changed by the annealing condition as well as excitation energy. The band will be decomposed into three Gaussian-type bands. Origin of the three emission bands is discussed. (C) 2000 Elsevier Science B.V. All rights reserved.
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