摘要
通过高温固相反应在空气中制备了BaMgSiO4:Eu2+/Eu3+发光材料,利用粉末X射线衍射(XRD)、红外光谱(FTIR)、扫描电镜(SEM)、荧光光谱(PL)对合成的样品进行表征。研究表明,在393nm激发光激发下,BaMgSiO4:Eu2+/Eu3+材料同时表现出Eu2+和Eu3+的发射光谱;改变NH4Cl质量分数可有效调整Eu2+和Eu3+的发光强度,实现从绿光到白光的有效调控。Eu3+发光强度随着NH4Cl用量增加而增大;当NH4Cl质量分数为5%时,Eu2+和Eu3+的发光强度比(IEu2+/Eu3+)最低,可获得国际照明委员会(CIE)色坐标为(0.37,0.38)、色温(CCT)为4300K的暖白光。BaMgSiO4:Eu2+/Eu3+表现出良好的热稳定性,在200℃时,其发光强度仅下降了15%。研究表明BaMgSiO4:Eu2+/Eu3+荧光粉可作为潜在的单一掺杂单一组成的白光发光二极管(LED)发光材料。
The BaMgSiO4 ： Eu^2＋/Eu^3＋ phosphors are prepared in air atmosphere by a conventional solid-state reaction, the properties of BaMgSiO4 ： Eu^2＋/Eu^3＋ phosphors are investigated through X-ray diffraction （XRD）, infrared spectroscopy （FTIR）, scanning electron microscope （SEM） and photoluminescence （PL）. The results suggest that the emission spectra of Eu2＋ and Eu3＋ ions are both presented in the Eu-doped BaMgSi04 phosphors under the excitation of 393 nm, and the emission intensity of Eu^2＋/Eu^3＋ can be changed with the NH4CI contents to achieve tunable spectra from green light to white light. The PL intensity of Eu^3＋＋ is improved with increasing of NH4 C1 contents, and the value of I Eu^2＋/Eu^3＋ is the smallest when adding 5 % NH4 C1 in the BaMgSiO4 ;Eu^2＋/Eu^3＋. The warm white light with international commission on illumination （CIE） chromaticity coordinates （0.37, 0.38） and color temperature CCT （4300 K） is obtained. BaMgSiO4 ：Eu^2＋/Eu^3＋ phosphor shows better thermal stability because the emission intensity measured at 200 is only decreased 15 % compared with that measured at room temperature. The results show that BaMgSiO4 ： Eu^2＋/Eu^3＋ can be used as potential single-doped and single-composition white light emitting diode （LED） phosphors.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2014年第5期185-190,共6页
Acta Optica Sinica
基金
国家自然科学基金(61368007)
西昌学院博士研究生基金(13BQZ03)
作者简介
游潘丽（1969-），女，博士，副教授，主要从事节能发光材料和建筑材料等方面的研究。E—mail：youpanlizb@163．com
