摘要
获得具有良好热稳定性和发光性能的非接触式光学温度传感材料是目前的研究热点之一,本工作通过高温固相法制备了Er^(3+)/Yb^(3+)共掺CaGdAlO_(4)∶Er_(x),Yb_(0.10)(x=0.006、0.008、0.010、0.012、0.014)荧光粉,尺寸大小分布在0.6~4.2μm。在980 nm激光激发下,该荧光粉在500~700 nm发射谱由两个发射带组成,528和550 nm处两个较强的绿光发射带,归属于Er^(3+)的^(2)H_(11/2)→^(4)I_(15/2)、^(4)S_(3/2)→^(4)I_(15/2)能级跃迁,663 nm处较弱的红光发射带,归属于Er^(3+)的^(4)F_(9/2)→^(4)I_(15/2)能级跃迁。上转换发光强度最大组分为CaGdAlO_(4)∶Er_(0.010),Yb_(0.10)。300~573 K变温发射谱表明,基于荧光强度比FIR_(528/550)参数,温度传感绝对灵敏度S_(A)从44.4×10^(-4) K^(-1)(@300 K)先增大到52.0×10^(-4) K^(-1)(@445 K)随后减小到49.0×10^(-4) K^(-1)(@573 K)。相对灵敏度S_(R)则从0.95×10^(-2) K^(-1)(@300 K)单调减小到0.27×10^(-2) K^(-1)(@573 K)。冷热循环实验表明该材料的热重复性优于98%。结果表明,CaGdAlO_(4)∶Er_(0.010),Yb_(0.10)荧光粉在光学温度传感领域具有潜在的应用前景。
Obtaining non-contact optical temperature sensing materials with good thermal stability and luminescent properties is one of the current research hotspots.In this work,Er^(3+)/Yb^(3+)co doped CaGdAlO_(4)∶Er_(x),Yb_(0.10)(x=0.006,0.008,0.010,0.012,0.014)single-phase phosphors were prepared by high-temperature solid-state method.For CaGdAlO_(4)∶Er_(x),Yb_(0.10) powders with different Er^(3+)doping concentrations,the particle sizes range from 0.6μm to 4.2μm.When the samples are under 980 nm laser excitation,there exists two emission bands in the 500~575 nm range and one emission band in the 630~690 nm.The two stronger green emission bands located at 528 and 550 nm,and they could be attributed to ^(2)H_(11/2)→^(4)I_(15/2) and ^(4)S_(3/2)→^(4)I_(15/2) transitions,while the weaker red emission band at 663 nm could be attributed to ^(4)F_(9/2)→^(4)I_(15/2) transition of Er^(3+).The optimal upconversion luminescence intensity was obtained from CaGdAlO_(4)∶Er_(0.010),Yb_(0.10).In the temperature range of 300~573 K,based on fluorescence intensity ratio FIR_(528/550) parameters,the absolute sensitivity S_(A) increases from 44.4×10^(-4) K^(-1)(@300 K)to 52.0×10^(-4) K^(-1)(@445 K),and then decreases to 49.0×10^(-4) K^(-1)(@573 K).The relative sensitivity S_(R) decreases monotonically from 0.95×10^(-2) K^(-1)(@300 K)to 0.27×10^(-2) K^(-1)(@573 K).Furthermore,the heating-cooling cycling experiment shows that the thermal repeatability of temperature sensing for the phosphor is better than 98%.The results demonstrate that CaGdAlO_(4)∶Er_(0.010),Yb_(0.10) phosphors have potential applications in the field of optical temperature sensing.
作者
李玉强
杨健
王帅
郑基源
赵炎
周恒为
刘玉学
LI Yuqiang;YANG Jian;WANG Shuai;ZHENG Jiyuan;ZHAO Yan;ZHOU Hengwei;LIU Yuxue(Xinjiang Laboratory of Phase Transitions and Microstructures of Condensed Matter Physics,School of Physical Science and Technology,Yili Normal University,Yining 835000,China;School of Physics,Northeast Normal University,Changchun 130024,China)
出处
《人工晶体学报》
CAS
北大核心
2024年第4期649-655,共7页
Journal of Synthetic Crystals
基金
伊犁师范大学校级科研项目(2023YSZD005)。
