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: | |
顯示於類別: | 期刊論文 |