摘要
采用共沉淀法合成Yb^(3+)和Er^(3+)共掺Sr_(3)P_(4)O_(13)上转换发光材料,探究pH、煅烧温度、Er^(3+)掺杂量等对样品物相结构和上转换发光性能的影响。用X射线粉末衍射仪(XRD)、扫描电子显微镜(SEM)、紫外可见漫反射光谱(UV-Vis DRS)和上转换荧光光谱仪(UPL)表征样品的物相组成、微观形貌和上转换发光性能。研究结果表明:煅烧温度对样品的物相形成影响较大,在1 000℃下煅烧20 h可得到属于三斜晶系空间群P■(2)的纯相Yb^(3+)和Er^(3+)共掺Sr_(3)P_(4)O_(13)样品,制备样品为不规则形貌的粉体。在980 nm光源激发下,样品在525,550和669 nm处分别出现Er^(3+)的上转换特征发射峰,并在Er^(3+)掺杂量分别为1%和0.5%时分别观察到绿光发射带和红光发射带的浓度猝灭现象。对泵浦功率和发光强度关系研究表明,525,550和669 nm处的上转换发射均属双光子吸收发射机制。所制备Sr_(3)P_(4)O_(13):1%Yb^(3+), 1%Er^(3+)样品色坐标位于(0.291,0.695),色纯度为97.8%,色温为6 095 K。
Yb^(3+), Er^(3+)co-doped Sr_(3)P_(4)O_(13)up-conversion luminescent materials were synthesized via co-precipitation method. The effects of p H and reaction temperature on phase structure, as well as the Er^(3+)doping concentration on up-conversion luminescence properties were investigated. The phase structure, morphology, and up-conversion luminescence properties were characterized by X-ray diffraction analysis(XRD), scanning electron microscopy(SEM), UV-visible diffuse reflectance spectroscope(UV-Vis DRS) and up-conversion luminescence spectrophotometer(UPL). The results show that the reaction temperature plays an important role in determining the phase structure. The single phase Yb^(3+)and Er^(3+)co-doped Sr_(3)P_(4)O_(13)samples with irregular morphology in triclinic space group P■(2) are synthesized at 1 000 ℃ for 20 h. The up-conversion emission peaks of Er^(3+)at 525, 550 and669 nm are observed during 980 nm near-infrared excitation, and the concentration quenching for green emission and red emission are observed when the doping amount of Er^(3+)are higher than 1% and 0.5%, respectively. The relationship between pump power and luminescence intensities of the emission peaks at 525, 550 and 669 nm reveals that those up-conversion emissions are due to a tow-photon absorption-emission mechanism. The color coordinate, color purity and color temperature of the Sr_(3)P_(4)O_(13): 1%Yb^(3+), 1%Er^(3+)sample are calculated as(0.291,0.695), 97.8%, and 6 095 K, respectively.
作者
饶啟亮
张玲
朱浩天
郭海瑞
朱莉萍
陈雪羽
杨锦瑜
RAO Qiliang;ZHANG Ling;ZHU Haotian;GUO Hairui;ZHU Liping;CHEN Xueyu;YANG Jinyu(School of Chemistry and Materials Science,Guizhou Normal University,Guiyang 550001,China;Key Laboratory For Functional Materials Chemistry of Guizhou Province,Guizhou Normal University,Guiyang 550001,China;Institute of Education,Guizhou Normal University,Guiyang 550001,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2021年第10期3439-3447,共9页
Journal of Central South University:Science and Technology
基金
贵州省科学技术基金资助项目(黔科合基础[2019]1229)
国家自然科学基金资助项目(213610007,51776046)。
