Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Luminous and tunable white-light upconversion for YAG ( Yb 3 Al 5 O 12 ) and ( Yb , Y ) 2 O 3 nanopowders

Not Accessible

Your library or personal account may give you access

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 1015lmW1, 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

Full Article  |  PDF Article
More Like This
White-light upconversion emissions and color tunability of 12CaO·7Al2O3:Ho3+/Yb3+/Tm3+ single crystal

Yunfei Qu, Rui Wang, Zhaozhong Qiu, Ye Tao, and Jianjun Zhou
Opt. Mater. Express 5(8) 1881-1889 (2015)

Tunable luminescence Y3Al5O12:0.06Ce3+, xMn2+ phosphors with different charge compensators for warm white light emitting diodes

Yurong Shi, Yuhua Wang, Yan Wen, Zhengyan Zhao, Bitao Liu, and Zhigang Yang
Opt. Express 20(19) 21656-21664 (2012)

Energy transfer properties and enhanced color rendering index of chromaticity tunable green-yellow-red-emitting Y3Al5O12: Ce3+, Cr3+ phosphors for white light-emitting diodes

Ran Ma, Chaoyang Ma, Jiantao Zhang, Jiaqi Long, Zicheng Wen, Xuanyi Yuan, and Yongge Cao
Opt. Mater. Express 7(2) 454-467 (2017)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved