摘要
采用溶剂热法合成了Na Bi F4:Yb^3+/Er^3+上转换发光纳米材料,讨论了在溶剂热阶段反应温度、反应时间对Na Bi F4:Yb^3+/Er^3+物相组成、形貌及发光性能的影响。结果表明:在反应阶段,适当增加反应温度、延长反应时间,可以增强Na Bi F4:Yb^3+/Er^3+的结晶度,进而提高上转换发光效率,但溶剂热阶段反应温度高于220℃时,容易生成金属铋。此外,通过Rb^+离子掺杂可进一步增强Na Bi F4:Yb^3+/Er^3+的上转换发光强度。Rb^+掺杂量为5%(摩尔分数)时,绿光和红光分别增加至原来的1.73和1.5倍。最后基于荧光强度比(IFIR)技术,研究了样品在300~500 K温度范围的IFIR变化曲线,结果表明:Na Bi F4:Yb^3+/Er^3+样品在温度传感领域有潜在应用价值。
Na Bi F4:Yb^3+/Er^3+upconversion nanoparticles were synthesized by a solvothermal method.The effects of reaction temperature and time on the composition,morphology and luminescence properties of Na Bi F4:Yb^3+/Er^3+were investigated.The results show that increasing the reaction temperature and time in the solvothermal reaction properly enhance the crystallinity of Na Bi F4:Yb^3+/Er^3+,and improve the upconversion luminescence efficiency.It is easy to produce the bismuth at the temperature of>220℃.In addition,the upconversion luminescence intensity of Na Bi F4:Yb^3+/Er^3+can be also enhanced via Rb^+ion doping.The green and red emissions of Na Bi F4:Yb^3+/Er^3+doped with 5 mol%Rb^+ions increase to 1.73 and 1.5 times,respectively.The temperature sensitivity of the upconversion luminescence was examined.The fluorescence intensity ratio of the samples at 300–500 K was characterized by a fluorescence intensity ratio(IFIR)technique.It is indicated that the Na Bi F4:Yb^3+/Er^3+samples could have a potential application in the field of temperature sensor.
作者
陈静
王友法
CHEN Jing;WANG Youfa(State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2020年第1期35-43,共9页
Journal of The Chinese Ceramic Society
基金
武汉市科技攻关项目(2017060201010191)
国家自然科学基金(51772233)
国家重点研究发展计划(2018YFB110550,2017YFC1103800,2016YFC1101605)项目。
关键词
四氟铋钠
溶剂热法
上转换发光
铷离子掺杂
温度传感
odium bismuth tetrafluoride
solvothermal method
upconversion luminescence
rubidium ion doping
temperature sensor
