Li(Na,K)Ba(Sr,Ca)B_(9)O_(15)∶Eu^(3+)荧光粉的制备及发光性能  

Synthesized and Luminescent Properties of Li(Na,K)Ba(Sr,Ca)B_(9)O_(15)∶Eu^(3+) Phosphor

作　　者：王俣欢 陈永杰[1] 张文花 耿秀娟[1] 杨英[1] WANG Yuhuan;CHEN Yongjie;ZHANG Wenhua;GENG Xiujuan;YANG Ying(Key Laboratory of Rare Earth Chemistry and Application of Liaoning Province, Shenyang University of Chemical Technology, Shenyang 110142, China)

机构地区：[1]沈阳化工大学,辽宁省稀土化学及应用重点实验室,沈阳110142

出　　处：《人工晶体学报》2021年第9期1694-1701,1722,共9页Journal of Synthetic Crystals

摘　　要：采用高温固相法在空气气氛下合成了一系列Eu^(3+)掺杂硼酸盐基质荧光粉。用X射线衍射、荧光光谱以及色坐标等手段对荧光粉的晶相和发光性能进行表征。通过LiBaB_(9)O_(15)中的碱金属以及碱土金属之间的相互取代,研究了基质组成的改变对荧光粉发光性能的影响。结果表明,在Li(Na,K)Ba(Sr,Ca)B_(9)O_(15)∶0.07Eu^(3+)系列荧光粉中,LiSrB_(9)O_(15)∶0.07Eu^(3+)荧光粉的发光强度最强。考察了煅烧温度、保温时间和Eu^(3+)掺杂量对LiSrB_(9)O_(15)∶Eu^(3+)荧光粉晶相和发光性能的影响,煅烧温度为750℃,保温时间为1~5 h时,样品的结晶性均良好。Eu^(3+)掺杂量为0.52时,LiSrB_(9)O_(15)∶Eu^(3+)荧光粉的发光强度最强。当x≥0.42(x=0.42,0.47,0.52,0.57)时,LiSrB_(9)O_(15)∶xEu^(3+)色坐标均接近标准红光(0.67,0.33)。比较了LiSrB_(9)O_(15)∶xEu^(3+)(x=0.02~0.57)荧光粉的611 nm(5D0→7F2)和586 nm(5D0→7F1)处发射峰相对强度比值R,R值变化不大,说明多数Eu^(3+)在晶格中处于非反演对称中心的格位;比较了LiSrB_(9)O_(15)∶0.52Eu^(3+)荧光粉和商用Y2O3∶Eu^(3+)荧光粉的发光特性,在260 nm波长激发下,LiSrB_(9)O_(15)∶0.52Eu^(3+)荧光粉的发光强度弱于Y2O3∶Eu^(3+)荧光粉;在362 nm和394 nm波长激发下,LiSrB_(9)O_(15)∶0.52Eu^(3+)荧光粉的发光强度强于Y2O3∶Eu^(3+)荧光粉。A series of Eu^(3+)-doped borate-based phosphors were synthesized by high temperature solid-state method in air atmosphere.The crystal phase and luminescence properties of phosphors were characterized by X-ray diffraction,fluorescence spectroscopy and chromaticity coordinates.Through the mutual substitution between alkali metals and alkaline earth metals in the LiBaB_(9)O_(15),the effect of the change of the matrix composition on the luminescence properties of phosphors was investigated.In the series of Li(Na,K)Ba(Sr,Ca)B_(9)O_(15)∶0.07Eu^(3+)phosphors,LiSrB_(9)O_(15)∶0.07Eu^(3+)phosphor has the strongest emission intensity.The effects of calcination temperature,holding time and Eu^(3+)doping concentration on the crystal phase and luminescence properties of LiSrB_(9)O_(15)∶Eu^(3+)phosphor were investigated.When the calcination temperature is 750℃and holding time is 1~5 h,the crystallinity of all the samples is good.When the Eu^(3+)doping concentration is 0.52,LiSrB_(9)O_(15)∶Eu^(3+)phosphor has the strongest luminescence intensity.When x≥0.42(x=0.42,0.47,0.52,0.57),the color coordinates of LiSrB_(9)O_(15)∶xEu^(3+)are close to the standard red light(0.67,0.33).The relative intensity ratio R of the emission peak at 611 nm(5D0→7F2)and 586 nm(5D0→7F1)of LiSrB_(9)O_(15)∶xEu^(3+)(x=0.02~0.57)phosphors were compared.R value is not changed obviously,the majority of Eu^(3+)in the crystal lattice locates in inversion symmetry center sites.The luminescence properties of the LiSrB_(9)O_(15)∶0.52Eu^(3+)phosphor and the commercial Y2O3∶Eu^(3+)phosphor were compared,the luminescence intensity of LiSrB_(9)O_(15)∶0.52Eu^(3+)phosphor is weaker than Y2O3∶Eu^(3+)phosphor under excitation of 260 nm wavelength,stronger than Y2O3∶Eu^(3+)phosphor under excitation of 362 nm and 394 nm wavelength.

关 键 词：硼酸盐基质 高温固相法 荧光粉 发光性能 Eu^(3+)掺杂 

分 类 号：O482.31[理学—固体物理]