Suppressing the phase transformation and enhancing the orange luminescence of (Sr,Ba)3SiO5:Eu2+ for application in white LEDs

被引：16
作者：
Chen, Lei [1 ,2 ]
Luo, Anqi [1 ]
Jiang, Yang [1 ]
Liu, Fayong [1 ]
Deng, Xiaorong [1 ]
Xue, Shaochan [1 ]
Chen, Xinhui [1 ]
Zhang, Yao [1 ]
机构：
[1] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China
[2] Semicond & Optoelect Technol Engn Res Ctr Anhui P, Wuhu 241000, Peoples R China
来源：
MATERIALS LETTERS | 2013年 / 106卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Phosphor; Luminescence; Phase transformation; Sr3SiO5:Eu2+; LIGHT-EMITTING-DIODES; PHOSPHOR; PHOTOLUMINESCENCE; EMISSION;
D O I：
10.1016/j.matlet.2013.05.057
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An orange phosphor Sr3SiO5:Eu2+ was synthesized by high temperature solid state reaction. The coexisted phase Sr2SiO4:Eu2+ tended to compromise the whole luminescent properties. Sr2SiO4:Eu2+ was formed as a result of the decomposition of Sr3SiO5:Eu2+ during the cooling process, which emitted green light at about 560 nm. Furthermore, the decomposition degree of Sr3SiO5:Eu2+ phase was related to the temperature. Microstructure analysis suggested that slight stoichiometric excess of SrO in the raw materials was able to suppress the decomposition of Sr3SiO5:Eu2+, thus leading to enhanced emission intensity. A new viewpoint was proposed to explain the mechanism of decomposition in the synthesis process of Sr3SiO5:Eu2+. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：428 / 431
页数：4
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