光学学报, 2014, 34 (5): 0516001, 网络出版: 2014-04-22   

BaMgSiO4:Eu2+/Eu3+可调白光发光材料的制备和性能研究

Synthesis and Properties of BaMgSiO4:Eu2+/Eu3+ Phosphor with Color-Tunable White Lighting
作者单位
1 西昌学院工程技术学院, 四川 西昌 615013
2 昆明理工大学机电学院, 云南 昆明 650093
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393 nm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(I Eu2+/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4300 K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。
Abstract
The BaMgSiO4:Eu2+/Eu3+ phosphors are prepared in air atmosphere by a conventional solid-state reaction, the properties of BaMgSiO4:Eu2+/Eu3+ 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 BaMgSiO4 phosphors under the excitation of 393 nm, and the emission intensity of Eu2+/Eu3+ can be changed with the NH4Cl contents to achieve tunable spectra from green light to white light. The PL intensity of Eu3+ is improved with increasing of NH4Cl contents, and the value of I Eu2+/Eu3+ is the smallest when adding 5% NH4Cl in the BaMgSiO4:Eu2+/Eu3+. 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:Eu2+/Eu3+ 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:Eu2+/Eu3+ can be used as potential single-doped and single-composition white light emitting diode (LED) phosphors.

游潘丽, 胡曰博. BaMgSiO4:Eu2+/Eu3+可调白光发光材料的制备和性能研究[J]. 光学学报, 2014, 34(5): 0516001. You Panli, Hu Yuebo. Synthesis and Properties of BaMgSiO4:Eu2+/Eu3+ Phosphor with Color-Tunable White Lighting[J]. Acta Optica Sinica, 2014, 34(5): 0516001.

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