摘要
采用水热法合成了NaGd(WO4)2:Eu3+荧光粉.采用XRD、热失重与差热分析、荧光光谱图表征样品的结构和发光特性.结果表明,样品未经退火处理时,在266nm激发光激发下,300~600nm处有一WO2-4产生宽带发射带和Eu3+在614nm处产生的红光.发光特性证实NaGd(WO4)2:Eu3+荧光粉可用于制造单基质的白光LED.随着退火温度的升高,样品由WO2-4产生的宽带发射带逐渐减弱直至消失,最后在800℃退火的NaGd(WO4)2:Eu3+荧光粉在614nm处产生红光.从理论上分析了WO2-4的发光机理.
NaGd(WO4)2:Eu^3+ phosphor was synthesized by the hydrothermal method. The morpholo- gy and luminescent properties have been investigated by advanced analysis methods such as XRD, TGA, DSC and photoluminescence spectra. Under the 266 nm excitation, the sample of WO^2-4 produced broad- band emission band at 300-600 nm and Eu3+ ions produced red light at 614 nm without annealing treat- ment. Luminescence properties showed that NaGd(WO4)2 .Eu^3+ phosphors could be used in the manufac- ture of white LED of single matrix. With the increase of annealing temperature, the broadband emission of sample produced by WO^2-4 weakened gradually until disappeared. Finally, NaGd(WO4)2 .Eu^3+ phosphors annealing in 800 ℃ produced red light at 614 nm,WO^2-4 luminescence mechanism was analyzed in theory.
出处
《河北大学学报(自然科学版)》
CAS
北大核心
2015年第1期21-26,共6页
Journal of Hebei University(Natural Science Edition)
基金
国家自然科学基金资助项目(11474083)
河北省教育厅资助项目(ZD2014069)
关键词
水热法
退火温度
位形坐标
WOi
hydrothermal
annealing temperature
configuration coordinate
WO^2-4