White light emission from radical carbonyl-terminations in Al2O3-SiO2 porous glasses with high luminescence quantum efficiencies

被引：74

作者：

Hayakawa, T ^{[1
]}

Hiramitsu, A ^{[1
]}

Nogami, M ^{[1
]}

机构：

[1] Nagoya Inst Technol, Dept Mat Sci & Engn, Showa Ku, Nagoya, Aichi 4668555, Japan

来源：

APPLIED PHYSICS LETTERS | 2003年 / 82卷 / 18期

关键词：

D O I：

10.1063/1.1569038

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Development of white phosphors with highly emissive, stable, and less toxic characteristics has been important for display and lighting technology. In this letter, it is shown that sol-gel-derived glasses of aluminosilicate composition, followed by a heat treatment in air at low temperatures around 500 degreesC, exhibit two intense, visible photoluminescence bands: One is due to point defects in these glasses and the other comes from radical carbonyl-terminations on the surface of pores. The photoluminescence provides a white light with high luminescence quantum efficiency (similar to66.5%) under long-wavelength ultraviolet excitation. (C) 2003 American Institute of Physics.

引用

页码：2975 / 2977

页数：3

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