Preparation and characterization of EU3+ activated CaSiO3, (CaA)SiO3 [A = Ba or Sr] phosphors

被引：21

作者：

Dhoble, SJ

Dhoble, NS

Pode, RB

机构：

[1] Kamla Nehru Coll, Nagpur 440009, Maharashtra, India

[2] Sevadal Womens Coll, Nagpur 440009, Maharashtra, India

[3] Nagpur Univ, Dept Phys, Nagpur 440010, Maharashtra, India

来源：

BULLETIN OF MATERIALS SCIENCE | 2003年 / 26卷 / 04期

关键词：

CaSiO3; photoluminescence; sol-gel; phosphor;

D O I：

10.1007/BF02711179

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

EU3+ activated CaSiO3, (Ca, Ba) SiO3 and (Ca, Sr) SiO3 have been prepared by sol-gel technique. Residual solvent and organic contents in the gel were removed by firing at 100degreesC for 3-4 h at 300 and 600degreesC for 2 h. Small exothermic shoulder around 850 to 875degreesC, as observed in DTA curve, corresponds to crystallization temperature of the doped calcium silicate. Influence of firing temperature on the luminescence of Eu3+ shows the maximum emission intensity in gel fired at 850degreesC. Photoluminescence emission peak is observed at 614 nm due to D-5(0) --> F-7(2) transition of EU3+ ion in (Ca, Ba) SiO3 and (Ca, Sr) SiO3 phosphors, when excited by 254 urn. The (Ca, Ba) SiO3 material is proposed as an efficient red phosphor.

引用

页码：377 / 382

页数：6

共 43 条

[1] Low-temperature synthesis of pure and Mn-doped willemite phosphor (Zn2SiO4:Mn) in aqueous medium [J].