Highly efficient near-infrared to visible upconversion luminescence in transparent glass ceramics containing Yb3+/Er3+:NaYF4nanocrystals

✍ Scribed by Huang, Ping ;Liu, Feng ;Chen, Daqin ;Wang, Yuansheng ;Yu, Yunlong

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 784 KB
• Volume: 205
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200724078

✦ Synopsis

Abstract

The frequency upconversion emissions of NaYF~4~ nanocrystals embedded in transparent glass ceramics codoped with Yb^3+^/Er^3+^, prepared by melt quenching and subsequent heating, were investigated. It was found that, compared with that of the sample singly doped with 0.5Er^3+^, the intensities of the green and red upconversion luminescence increased by about 30 and 150 times, respectively, for the sample codoped with 0.5Er^3+^/1.0Yb^3+^, attributed to the efficient energy transfer from Yb^3+^ with high absorption cross section to Er^3+^ (both of them were concentrated in the NaYF~4~ nanocrystals). The intense visible upconversion luminescence and the convenient, low‐cost synthesis of the glass ceramic make it an excellent substitutional material for the unobtainable bulk NaYF~4~ crystals potentially applicable in many fields. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)