Visible quantum cutting through downconversion in green-emitting K2GdF5:Tb3+ phosphors

被引：96

作者：

Lee, Te-Ju ^{[1
]}

Luo, Li-Yang

Diau, Eric Wei-Guang

Chen, Teng-Ming

Cheng, Bing-Ming

Tung, Chien-Yueh

机构：

[1] Natl Chiao Tung Univ, Dept Appl Chem, Hsinchu 30010, Taiwan

[2] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

[3] Ind Technol Res Inst, Union Chem Labs, Hsinchu 30011, Taiwan

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 13期

关键词：

D O I：

10.1063/1.2358193

中图分类号：

O59 [应用物理学];

学科分类号：

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.

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页数：3

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