The photoluminescence of rutile and anatase TiO2 has been investigated in the range of 360–890 nm at several temperatures. An unexpected intense near-infrared ~1.53 eV! photoluminescence band was recorded for both phases. At low temperatures, the resulting bands form a substructure of equally spaced peaks irrespective of the phase. The spectra were interpreted in the framework of the single-configuration-coordinate model as the phonon-replica effect, originating from ionization of oxygen vacancies.
Near-infrared photoluminescence in titania: Evidence for phonon-replica effect
MONTONCELLO, Federico;CAROTTA, Maria Cristina;FERRONI, Matteo;GIBERTI, Alessio;GUIDI, Vincenzo;MALAGU', Cesare;MARTINELLI, Giuliano;
2003
Abstract
The photoluminescence of rutile and anatase TiO2 has been investigated in the range of 360–890 nm at several temperatures. An unexpected intense near-infrared ~1.53 eV! photoluminescence band was recorded for both phases. At low temperatures, the resulting bands form a substructure of equally spaced peaks irrespective of the phase. The spectra were interpreted in the framework of the single-configuration-coordinate model as the phonon-replica effect, originating from ionization of oxygen vacancies.File in questo prodotto:
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