Luminous and tunable white-light upconversion for YAG (Yb 3Al5O12) and (Yb;Y)2O3 nanopowders
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Detail(s)
| Original language | English |
|---|---|
| Pages (from-to) | 3922-3924 |
| Journal / Publication | Optics Letters |
| Volume | 35 |
| Issue number | 23 |
| Publication status | Published - 1 Dec 2010 |
Link(s)
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.
In: Optics Letters, Vol. 35, No. 23, 01.12.2010, p. 3922-3924.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
