標題: Visible quantum cutting through downconversion in green-emitting K2GdF5 : Tb3+ phosphors
作者: Lee, Te-Ju
Luo, Li-Yang
Diau, Eric Wei-Guang
Chen, Teng-Ming
Cheng, Bing-Ming
Tung, Chien-Yueh
應用化學系
Department of Applied Chemistry
公開日期: 25-九月-2006
摘要: Visible quantum cutting under excitations at 212 and 172 nm in a green-emitting phosphor K2GdF5:Tb3+ (11%) via a downconversion mechanism is investigated. The authors measured the vacuum ultraviolet (VUV) excitation and emission spectra and proposed mechanisms to rationalize the quantum-cutting effect. One short-UV or one VUV photon absorbed by Tb3+ is split into multiple visible photons emitted by Tb3+ through cross relaxation and direct energy transfer. Calculations indicate an optimal quantum efficiency as great as 189% for this phosphor. (c) 2006 American Institute of Physics.
URI: http://dx.doi.org/10.1063/1.2358193
http://hdl.handle.net/11536/11760
ISSN: 0003-6951
DOI: 10.1063/1.2358193
期刊: APPLIED PHYSICS LETTERS
Volume: 89
Issue: 13
結束頁: 
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