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LaPO4:Er microspheres with high NIR luminescent quantum yield

AuthorsGarcía-Sevillano, J.; Cantelar, Eugenio; Justo, Ángel ; Ocaña, Manuel ; Cussó, Fernando
Issue Date2013
CitationMaterials Chemistry and Physics 138: 666- 671 (2013)
AbstractEr-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 η ≈ 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. © 2013 Elsevier B.V. All rights reserved.
Identifiersdoi: 10.1016/j.matchemphys.2012.12.036
issn: 0254-0584
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