Effects of crystal field on photoluminescence properties of Ca2Al2SiO7:Eu2+ phosphors

被引：34

作者：

Yang Penghui

Yu Xue ^{[1
]}

Yu Hongling

Jiang Tingming

Zhou Dacheng ^{[1
]}

Qiu Jianbei ^{[1
]}

机构：

[1] Kunming Univ Sci & Technol, Coll Mat Sci & Engn, Key Lab Adv Mat Yunnan Prov, Kunming 650093, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2012年 / 30卷 / 12期

基金：

高等学校博士学科点专项科研基金;

关键词：

luminescence; Ca2Al2SiO7:Eu2+; crystal field splitting; rare earths; LIGHT-EMITTING DIODE; LUMINESCENCE PROPERTIES; SR; BA; CA; EFFICIENT; YELLOW; OXYFLUORIDES; TEMPERATURE; CATION;

D O I：

10.1016/S1002-0721(12)60207-5

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A series of single-phased Ca2Al2SiO7:Eu2+ phosphors were synthesized by the solid-state reaction. Their structure and photoluminescence properties were investigated by the X-ray powder diffraction (XRD) and excitation and emission spectra in detail. The emission spectra of Ca2Al2SiO7:Eu2+ phosphors consisted of blue and green band located at 419 and 542 nm, respectively. The relative intensities of the blue and green emission changed with Eu2+ concentration and were sensitive to the excitation wavelength. The unique photoluminescence property originated from the 4f(7)-> 4f(6)5d transition of Eu2+ at different energy levels, on which the effect of the crystal field strength was considered to be tailed by adjusting the host composition.

引用

页码：1208 / 1212

页数：5

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