Sr_(3)(BN_(2))_(2)荧光粉的合成与发光性能  

Synthesis and Luminescence Properties of Sr_(3)(BN_(2))_(2)Phosphor

作　　者：马一智 李响 胡大海 王新然 王凤翔 朝克夫[1,2] 哈斯朝鲁 MA Yi-zhi;LI Xiang;HU Da-hai;WANG Xin-ran;WANG Feng-xiang;CHAO Ke-fu;HA Si-chao-lu(College of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot 010022, China;Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Material, Hohhot 010022, China)

机构地区：[1]内蒙古师范大学物理与电子学院,内蒙古呼和浩特010022 [2]内蒙古自治区功能材料物理与化学重点实验室,内蒙古呼和浩特010022

出　　处：《发光学报》2021年第4期470-477,共8页Chinese Journal of Luminescence

基　　金：内蒙古自然科学基金(2019MS05030);内蒙古科技计划(2019GG263);内蒙古师范大学研究生科研创新基金(CXJJS19111)资助项目。

摘　　要：采用高温固相一步法合成了新型荧光粉Sr_(3)(BN_(2))_(2)(以下简写为SBN)。采用X射线衍射、扫描电子显微镜、荧光分光光度计对荧光粉的相组成、形貌和发光性能进行表征。讨论了SBN荧光粉的缺陷发光机理和长余辉特性。结果表明,所制备的样品SBN晶体为立方晶系Im-3m。在紫外区域有较宽的激发带,发射光谱峰值位于525 nm,半峰宽为3334 cm^(-1)。SBN荧光粉材料存在本征缺陷,在基质中形成了Sr的空位,在光激励下形成发光中心。进一步的余辉衰减曲线与热释光曲线也证实,该材料存在固有缺陷,其余辉时间约10 s。变温光谱显示,当温度达到150℃时,荧光强度是室温初始强度的43%,优于稀土掺杂硼氮化物衰减到10%的结果。SBN荧光粉具有合成工艺简单、结构稳定、紫外波段激发获得长余辉绿光发射等优异性能,在LED发光器和指示方面具有潜在的应用前景。A new type of phosphor Sr_(3)(BN_(2))_(2)(hereinafter abbreviated as SBN)was synthesized by high temperature solid phase one-step method.The phase composition,morphology and luminescent properties of the phosphor were characterized by X-ray diffraction,scanning electron microscopy and fluorescence spectrophotometer.The defect luminescence mechanism and long afterglow characteristics of SBN phosphors were discussed.The results show that the prepared sample SBN crystals is cubic crystal system Im-3m.The results show that there is a wide excitation band in the ultraviolet region,and the emission spectrum peak is at 525 nm,and the half peak width is 3334 cm^(-1).The SBN phosphor material has inherent defects.Sr vacancies are formed in the matrix,and the luminous center is formed under light excitation.Further decay curve and thermoluminescence curve also confirm that the material has inherent defects,and the afterglow time is about 10 s.The variable temperature spectrum shows that when the temperature reaches 150℃,the fluorescence intensity is 43%of the initial intensity at room temperature,which is better than the 10%attenuation result of rare earth doped boron nitride.The SBN phosphor has a simple synthesis process,a stable structure,and excellent performance such as long afterglow green light emission obtained by ultraviolet wavelength excitation,and has potential application prospects in white light LED lighting and indication.

关 键 词：Sr_(3)(BN_(2))_(2) 缺陷发光材料 长余辉 发光机理 

分 类 号：O482.31[理学—固体物理]