摘要
采用高温固相法制备了La_(6)W_(2)O_(15):Er^(3+)荧光粉样品,并对其热耦合能级和非热耦合能级的温度传感特性进行分析.研究发现:La_(6)W_(2)O_(15):Er^(3+)荧光粉样品的最佳掺杂浓度为1.5%,最佳激发位置为380 nm,以549、524、660 nm为中心,有3处发射峰,强度依次减弱.利用变温光谱和能级跃迁关系,计算得到2组荧光强度比,即热耦合能级I524 nm/I549 nm和非热耦合能级I660 nm/I549 nm,其中最大绝对灵敏度分别为0.0074 K^(-1)和0.0004 K^(-1),最大相对灵敏度分别为4.553 K^(-1)和0.321 K^(-1).在室温300 K附近,热耦合能级的相对灵敏度为1.245%K^(-1),数值在几种已报道的同类文献里处于中档.该研究结果表明,La_(6)W_(2)O_(15):Er^(3+)荧光粉样品在温度传感方面具备良好的应用潜力.
La_(6)W_(2)O_(15):Er^(3+)phosphor were prepared by high temperature solid state reaction,and the temperature sensing characteristics of the thermally coupled and non-thermally coupled levels were analyzed.The results show that the best doping concentration of La_(6)W_(2)O_(15):Er^(3+)phosphor is 1.5%,the best excitation position is 380nm,and there are three emission peaks whose centers are 549 nm,524 nm and 660 nm,moreover,their intensities decreases in turn.On the basis of the variable temperature spectrum and the energy transition relationship,two sets of fluorescence intensity ratios(thermally coupled level I524 nm/I549 nm and uncoupled level I660 nm/I549 nm)were obtained,furthermore,their maximum absolute sensitivity and maximum relative sensitivity were calculated(the former are 0.0074 K^(-1)and 0.0004 K^(-1),respectively;the latter are 4.553 K^(-1)and 0.321 K^(-1),respectively).At around 300 K,the relative sensitivity of the thermally coupled energy level is 1.245%K^(-1),which is in the middle range of several reported similar literatures,indicating that La_(6)W_(2)O_(15):Er^(3+)phosphor have good application potential in temperature sensing.
作者
叶恒玮
田莲花
Ye Hengwei;TIAN Lianhua(College of Science,Yanbian University,Yanji 133002,China)
出处
《延边大学学报（自然科学版）》
CAS
2024年第3期14-21,共8页
Journal of Yanbian University（Natural Science Edition）
