期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 138, 期 2-3, 页码 666-671出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2012.12.036
关键词
Nanostructures; Chemical synthesis; Photoluminescence spectroscopy; Optical properties; Electron microscopy (STEM, TEM and SEM); Thermogravimetric analysis (TGA)
资金
- Ministerio de Ciencia e Innovacion and Comunidad de Madrid [MAT2009-14102, P2009/TIC-1476]
- Junta de Andalucia [FQM6090]
Er-doped LaPO4 microspheres have been synthesized by spray pyrolysis and the near infrared (NIR) properties have been characterized. It has been found that, following an adequate post-annealing treatment, the emission properties are remarkably improved. The NIR luminescence intensity is highly enhanced and its decay time increases to a value almost coincident with the reported radiative lifetime, which implies that the quantum yield approaches n approximate to 100%. This improvement in luminescence characteristics is probably related to the suppression of residual OH- radicals, that otherwise act as NIR luminescence quenchers, and to the increase in material's crystallinity. (C) 2013 Elsevier B.V. All rights reserved.
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