Phase transition and multicolor luminescence of Eu2+/Mn2+-activated Ca3(PO4)2 phosphors

被引：19

作者：

Li, Kai ^{[1
]}

Chen, Daqin ^{[2
]}

Xu, Ju ^{[2
]}

Zhang, Rui ^{[2
]}

Yu, Yunlong ^{[2
]}

Wang, Yuansheng ^{[1
]}

机构：

[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China

[2] Chinese Acad Sci, Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Fujian, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2014年 / 49卷

基金：

中国国家自然科学基金;

关键词：

Optical materials; Chemical synthesis; Luminescence; Optical properties; ENERGY-TRANSFER; PHOTOLUMINESCENCE;

D O I：

10.1016/j.materresbull.2013.09.054

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Intense blue-green-emitting Eu2+: Ca-3(PO4)(2) and tunable multicolor-emitting Eu2+Mn2+: Ca-3(PO4)(2) phosphors are prepared via a solid-state reaction route. Eu2+-doped orthorhombic Ca-3(PO4)(2) phosphor exhibits a broad emission band in the wavelength range of 400-700 nm with a maximum quantum yield of 56.7%, and the emission peak red-shifts gradually from 479 to 520 nm with increase of Eu2+ doping content. Broad excitation spectrum (250-420 nm) of Eu2+: Ca-3(PO4)(2) matches well with the near-ultraviolet LED chip, indicating its potential applications as tri-color phosphors in white LEDs. Interestingly, Mn2+ co-doping into Eu2+: Ca-3(PO4)(2) leads to its phase transition from orthorhombic to rhombohedral, and subsequently generates tunable multi-color luminescence from green to red via Eu2+ - Mn2+ energy transfer, under 365 nm UV lamp excitation. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：677 / 681

页数：5

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