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Luminescence of Ce doped LaPO4 nanophosphors upon Ce 4f-5d and band-to-band excitation |
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| Authors: | G. Stryganyuk D.M. Trots A. Voloshinovskii V. Zakordonskiy M. Pidzyrailo |
| Affiliation: | a HASYLAB at DESY, Notkestraße 85, 22607 Hamburg, Germany b Ivan Franko National University of Lviv, 8 Kyryla i Mefodiya Street, 79005 Lviv, Ukraine c Institute for Materials Science, Darmstadt University of Technology, Petersenstr. 23, 64287 Darmstadt, Germany d Institute of Experimental Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany |
| Abstract: | Luminescence spectral-kinetic studies have been performed for pure and Ce-doped LaPO4 micro- and nanosized phosphates using synchrotron radiation for the excitation within 5-20 eV energy range at T=8-300 K. Mechanisms for the excitation of Ce3+ 5d-4f emission as well as the quenching processes are discussed. The influence of surface defects has been considered to modify considerably the luminescent properties of nanosized phosphors upon the excitation in the energy range of Ce3+ 4f-5d transitions and LaPO4 host absorption. |
| Keywords: | 78.55.Hx |
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