绿色K_(2-x)Na_(x)Zn_(0.94)SiO_(4)∶0.06Mn^(2+)荧光粉晶体相变对光致发光性能的影响  

Effect of Crystal Phase Transition for Green Light Emitting K_(2-x)Na_(x)Zn_(0.94)SiO_(4)∶0.06Mn^(2+)Phosphor on Photoluminescence Properties

作　　者：热罕古丽·阿力木 热孜宛古丽·延塔克 高静 周玉霞 塔西买提·玉苏甫[1,2,3] 艾尔肯·斯地克 Rehanguli Alimu;Reziwanguli Yantake;Gao Jing;Zhou Yuxia;Taximaiti Yusufu;Aierken Sidike(Xinjiang Key Laboratory for Luminescence Minerals and Optical Functional Materials,School of Physics and Electronic Engineering,Xinjiang Normal University,Urumqi 830054,Xinjiang,China;Key Laboratory of Mineral Luminescent Material and Microstructure of Xinjiang,School of Physics and Electronic Engineering,Xinjiang Normal University,Urumqi 830054,Xinjiang,China;College of Chemistry and Chemical Engineering,Xinjiang Normal University,Urumqi 830054,Xinjiang,China)

机构地区：[1]新疆师范大学物理与电子工程学院新疆发光矿物与光功能材料研究重点实验室,新疆乌鲁木齐830054 [2]新疆师范大学物理与电子工程学院新疆矿物发光材料及其微结构实验室,新疆乌鲁木齐830054 [3]新疆师范大学化学化工学院,新疆乌鲁木齐830054

出　　处：《光学学报》2023年第11期155-163,共9页Acta Optica Sinica

基　　金：国家自然科学基金(12264050);新疆师范大学矿物发光与微结构重点实验室研究基金(KWFG202212)。

摘　　要：采用高温固相法,通过阳离子替代的实验策略,制备出系列窄带发射且颜色可由深黄色调至绿色的K_(2-x)Na_(x)Zn_(0.94)SiO_(4)∶0.06Mn^(2+)(0≤x≤2)荧光粉。用X射线粉末衍射仪对样品的物相进行表征,通过扫描电子显微镜和能量色散谱测试对样品的形貌和元素分布进行分析。结果表明,成功地合成了纯相且元素分布均匀的K_(2-x)Na_(x)Zn_(0.94)SiO_(4)∶0.06Mn^(2+)(0≤x≤2)荧光粉。在蓝光激发下,随着Na+离子逐渐代替K+离子,K_(2-x)Na_(x)Zn_(0.94)SiO_(4)∶0.06Mn^(2+)(0≤x≤2)荧光粉的发光强度逐渐增强,原荧光粉的发光强度得到有效提高的同时发光颜色由深黄色调至绿色。在427 nm激光的激发下:当x=0.8时,K_(1.2)Na_(0.8)Zn_(0.94)SiO_(4)∶0.06Mn^(2+)荧光粉发光最强;当x=2.0时,即K+完全被Na+替代,Na_(2)Zn_(0.94)SiO_(4)∶0.06Mn^(2+)荧光粉发射出中心波长为517 nm、半峰全宽为32 nm的绿光,相较于商用β-SiAlON∶Eu^(2+)绿色荧光粉,其半峰全宽更窄。Objective Light emitting diodes(LEDs)are widely used as backlight illumination sources in liquid crystal displays(LCDs).Narrowbandemitting green phosphors have become a research focus due to their potential to extend the color gamut of LCDs,yielding highdefinition/highresolution displays with excellent picture quality.Current commercial LED backlight technologies make use ofβ-SiAlON∶Eu^(2+)narrowband green phosphors[emission wavelength ofλ_(em)=540 nm,full width at half maximum(FWHM)of 54 nm]and K_(2)SiF_(6)∶Mn^(4+)narrowband red phosphors(λ_(em)=631 nm,FWHM of 3 nm)in conjunction with a 460-nm InGaN blue light chip.The peak emission level at 540 nm,and FWHM emission linewidth of around 54 nm ofβ-SiAlON∶Eu^(2+)green phosphors limit their application in wide color gamut displays.Therefore,there is a need to develop highperformance green phosphors with an emission peak at a wavelength of around 525 nm and with a narrower emission linewidth to address the shortcomings of existing commercial green phosphors.Methods Potassium carbonate(K_(2)CO_(3),mass fraction of 99.99%),sodium carbonate(Na_(2)CO_(3),mass fraction of 99.99%),zinc oxide(ZnO,mass fraction of 99.99%),silicon dioxide(SiO_(2),mass fraction of 99.99%),boric acid(H_(3)BO_(3),mass fraction of 99.99%),and manganese dioxide(MnO_(2),mass fraction of 99.99%)from Aladdin company are chosen as raw materials.A series of powder samples,K_(2-x)Na_(x)ZnSiO_(4)∶Mn^(2+)(0≤x≤2),are synthesized by the conventional,hightemperature solid phase method.The physical structure of the materials is analyzed by an XRD6100 powder diffractometer.Structural refinement of the XRD data of the samples is carried out by GSAS software.The morphology,particle size,and chemical composition of samples are analyzed with a JSM7610FPlus field emission scanning electron microscope(SEM)and XMaxN energy dispersive Xray spectroscopy(EDS).The excitation spectra,emission spectra,and variable temperature spectra of samples are tested by an FLS920 steadystate/transient fluorescence spec

关 键 词：材料 过渡金属掺杂材料 K_(2-x)Na_(x)Zn_(0.94)SiO_(4)∶Mn^(2+)(0≤x≤2) 窄带绿光发射 颜色调控 液晶显示背光源 

分 类 号：O482.31[理学—固体物理]