Luminous and tunable white-light upconversion for YAG (Yb 3Al5O12) and (Yb;Y)2O3 nanopowders

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Jiwei Wang
  • Jian Hua Hao
  • Peter A. Tanner

Detail(s)

Original languageEnglish
Pages (from-to)3922-3924
Journal / PublicationOptics Letters
Volume35
Issue number23
Publication statusPublished - 1 Dec 2010

Abstract

We report on multiphoton white-light upconversion in vacuum for Pechini synthesis Yb3Al5O12 (YbAG) and combustion synthesis (Yb; Y2)O3 nanopowders under IR excitation. Their intense white-light upconversion is attributed to charge transfer luminescence superimposed upon a broadband emission. Unlike common nanoscale phosphors, which show low luminescence efficiency, the intensity of white-light upconversion for nanopowders is similar to that of their bulk counterparts. The luminary efficacy of the upconversion is estimated to be 10-15 lm W -1, and the Commission Internationale d'Eclairage (CIE) coordinates can be widely tuned by the excitation power, pressure, and codoping ratio. The nano-YbAG sample exhibits a longer buildup time for emission, a higher excitation threshold, and a wider CIE range than the oxide nanopowders. © 2010 Optical Society of America.

Citation Format(s)

Luminous and tunable white-light upconversion for YAG (Yb 3Al5O12) and (Yb;Y)2O3 nanopowders. / Wang, Jiwei; Hao, Jian Hua; Tanner, Peter A.
In: Optics Letters, Vol. 35, No. 23, 01.12.2010, p. 3922-3924.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review