一种新型Ca_3Mg_3Si_4O_(14)∶Eu^(2+)绿色荧光粉的制备及其性能研究（英文）  

Preparation and Luminescence Properties of a New Green Emitting Ca_3Mg_3Si_4O_(14)∶Eu^(2+) Phosphor

作　　者：潘桦滟[1] 王乐[1] 李旸晖[1] 吴拓[1] 罗东[1] 

机构地区：[1]中国计量大学光学与电子科技学院,浙江杭州310018

出　　处：《光谱学与光谱分析》2017年第8期2627-2631,共5页Spectroscopy and Spectral Analysis

基　　金：National Natural Science Foundation of China(61405183,61575182);National Key R&D Plan(2017YFB0403105);Natural Science Foundation of Zhejiang Province(LY16F050004);Application Research Program of Commonweal Technology of Zhejiang Province(2015C31102)

摘　　要：采用CaCO3,MgO,SiO2,Eu2O3原料,通过高温固相法制备了Ca_3Mg_3Si_4O_(14)∶Eu^(2+)荧光粉。通过XRD图谱和PL光谱图,研究了Eu的掺杂浓度与助溶剂(NH_4Cl,BaF_2)对Ca_3Mg_3Si_4O_(14)∶Eu^(2+)荧光粉结构、发光性能和热稳定的影响。XRD图谱对比结果表明,制备的Ca_3Mg_3Si_4O_(14)∶Eu^(2+)荧光粉XRD图与理论计算得到的图谱几乎一致。Ca_3Mg_3Si_4O_(14)∶Eu^(2+)荧光粉在360~450nm有很强的激发强度,并且在440nm激发下发射峰值波长为530nm的发射光。随着Eu^(2+)离子浓度的增加,发射光谱出现了红移,且在Eu^(2+)离子浓度约为6%时发生了浓度猝灭现象。当添加NH_4Cl和BaF_2作为助溶剂,Ca_3Mg_3Si_4O_(14)∶Eu^(2+)荧光粉的发光强度有一定提高。与未添加助溶剂的Ca_3Mg_3Si_4O_(14)∶Eu^(2+)荧光粉的发光强度相比,添加NH_4Cl助溶剂后发光强度增加了70%。此外,当温度升高至150℃时,Ca_3Mg_3Si_4O_(14)∶Eu^(2+)荧光粉和商用绿色荧光粉的发光强度分别降低了7.6%和14%,表明Ca_3Mg_3Si_4O_(14)∶Eu^(2+)荧光粉具有良好的热稳定性。这些发光性能均表明Ca_3Mg_3Si_4O_(14)∶Eu^(2+)荧光粉是是一种可应用于固态照明的有前景的绿色荧光粉。Green light-emitting Ca3Mg3Si4O14：Eu2＋ phosphors were prepared by solid-state reaction using CaCO3,MgO,SiO2 and Eu2O3 as raw materials.The effects of Eu-doping concentration and fluxes（NH4Cl,BaF2）on the crystal structure,luminescence property,and thermal stability of phosphor were studied,which were characterizes by X-ray diffraction（XRD）,and photoluminescence（PL）spectra,respectively.The XRD results show that the crystal structure of Ca3Mg3Si4O14：Eu2＋ is consistent with the calculated patterns,which investigated the crystal structure of the compound Ca3Mg3Si4O14：Eu2＋.The phosphor has strong excitation around 360～450 nm and exhibits a broad emission band with a maximum at 530 nm under 440 nm excitation.With the increase of Eu2＋ concentration,the phosphor shows a red-shift and the quenching concentration of Eu2＋ is about 6%.With the introduction of NH4Cl and BaF2 as fluxes,the luminous intensity of Ca3Mg3Si4O14：Eu2＋ phosphor has been improved.Compared with the luminescence intensity of Ca3Mg3Si4O14：Eu2＋phosphor without flux,the photoluminescence intensity increased by 70%when adding NH4Cl as flux.Furthermore,the emission intensity reduced by only 7.6%and 14%at 150 ℃ for Ca3Mg3Si4O14：Eu2＋ phosphor and commercial green phosphor.The Ca3Mg3Si4O14：Eu2＋ phosphor also possesses high thermal stability,and these luminescnce properties indicate that Ca3Mg3Si4O14：Eu2＋ phosphor is a promising green phosphor for use in solid-state white lighting.

关 键 词：荧光粉 发光性能 助溶剂 热稳定性 

分 类 号：O462.3[理学—电子物理学]