Blue, green, red and near-infrared emissions via upconversion in α-sialon

被引：10

作者：

Kshetri, Yuwaraj K. ^{[1
]}

Joshi, Bhupendra ^{[2
]}

Kim, Tae-Ho ^{[2
]}

Lee, Soo Wohn ^{[2
]}

机构：

[1] Sun Moon Univ, Dept Adv Mat Engn, Chungnam 31460, South Korea

[2] Sun Moon Univ, Dept Environm & Biochem Engn, Chungnam 31460, Peoples R China

来源：

MATERIALS LETTERS | 2017年 / 199卷

基金：

新加坡国家研究基金会;

关键词：

alpha-Sialon; Hot pressing; Energy transfer; Upconversion; WHITE-LIGHT; CERAMICS; NANOCRYSTALS; LUMINESCENCE; LANTHANIDE;

D O I：

10.1016/j.matlet.2017.04.060

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Near-infrared to visible and near-infrared upconversion emission has been reported in Yb3+/Ln(3+) (Ln(3+) = Er3+/Tm3+/Ho3+)-alpha-sialon ceramic prepared by hot press sintering technique. Under 980 nm excitation, blue, green, red and near-infrared emissions are observed simultaneously as a result of the efficient energy transfer from Yb3+ to Er3+, Tm3+, and Ho3+ ions leading to a near-white light emission with CIE color coordinate of (0.38, 0.45). The two-and three-photon absorption processes are responsible for the observed upconversion emissions. The ceramic has moderately low phonon energy of 835 cm(-1). These novel properties make the material a promising candidate for upconversion applications. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：147 / 150

页数：4

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