Laser induced broadband white emission of Y2Si2O7 nanocrystals

被引：14
|
作者：
Tomala, Robert [1 ]
Hreniak, Dariusz [1 ]
Strek, Wieslaw [1 ]
机构：
[1] Polish Acad Sci, Inst Low Temp & Struct Res, Wroclaw, Poland
来源：
JOURNAL OF RARE EARTHS | 2019年 / 37卷 / 11期
关键词：
White light; Photoconductivity; Laser induced emission; Nanocrystals; UP-CONVERSION; LIGHT; PHOSPHOR; YB3+;
D O I：
10.1016/j.jre.2019.03.014
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The generation of broadband white emission of the alpha-Y2Si2O7 nanocrystals was observed upon excitation by focused beam ofCW lasers operating in near infrared, visible and blue regions. The influence of excitation energy on order of process is presented. The temperature of sample emitting laser induced white emission (LIWE) was determined by luminescence nanothermometry technique. It is found that the temperature is much lower than that predicted by blackbody model characterized with the same energy. It is shown that the LIWE is accompanied by efficient photocurrent. An origin of white emission is discussed in terms of multiphoton ionization process leading to the inter valence charge transfer emission. (C) 2019 Published by Elsevier B.V. on behalf of Chinese Society of Rare Earths.
引用
收藏
页码：1196 / 1199
页数：4
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