摘要
采用高温固相法成功制备出新型Ca_(5-x)Ga_(6)O_(14):xSm^(3+)应力发光材料。通过X射线衍射、扫描电镜、漫发射光谱、光致激发和发射光谱、荧光衰减曲线、应力发光光谱和热释光光谱等测试详细研究了Ca_(5-x)Ga_(6)O_(14):xSm^(3+)的晶体结构、表面形貌、光致发光和应力发光性能及其发光机理。在404 nm激发下,Ca_(5-x)Ga_(6)O_(14):xSm^(3+)呈现出4个发射峰,分别位于562,599,642,715 nm,对应Sm^(3+)的^(4)G_(5/2)→6Hj(j=5/2,7/2,9/2,11/2)的特征发射。随着Sm^(3+)离子掺杂浓度的增加,发光强度先增强后减弱,在x=0.07时获得最强发射,且衰减时间从1.92 ms缩短至1.30 ms。在滑动摩擦激发下可获得Ca_(5-x)Ga_(6)O_(14):xSm^(3+)的应力发光发射带,且应力发光强度与施加应力满足线性增长,表明该材料在应力传感领域具有潜在应用价值。
A novel Ca_(5-x)Ga_(6)O_(14):xSm^(3+)mechanoluminescent(ML)material was successfully prepared by high-temperature solid-state reaction method.The crystal structure,surface morphology,photoluminescence,ML properties and luminescence mechanism of Ca_(5-x)Ga_(6)O_(14):xSm^(3+)were investigated via X-ray diffraction(XRD),scanning electron microscopy(SEM),diffuse reflection spectra,photoluminescence excitation and emission spectra,luminescence decay,ML spectra and thermoluminescence spectra.Under the excitation of 404 nm,the emission peaks at 562,599,642,715 nm are detected in Ca_(5-x)Ga_(6)O_(14):xSm^(3+),corresponding to^(4)G_(5/2)→6Hj(j=5/2,7/2,9/2,11/2)characteristic emission of Sm^(3+).With the increase of Sm3+content,the luminescence intensity first increases and then decreases,the optimal luminescence intensity is obtained at x=0.07 and the decay time decreases from 1.92 ms to 1.30 ms.Under the sliding friction,ML emission band is obtained in Ca_(5-x)Ga_(6)O_(14):xSm^(3+),and the ML intensity increases linearly with applied stress,indicating that the material has potential application in the field of stress sensors.
作者
王强
刘伟
杜玉松
李欢
张志军
饶光辉
程帅
赵景泰
WANG Qiang;LIU Wei;DU Yusong;LI Huan;ZHANG Zhijun;RAO Guanghui;CHENG Shuai;ZHAO Jingtai(School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China;Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology,Guilin 541004,China;School of Mechanical and Electrical Engineering,Guilin University of Electronic Technology,Guilin 541004,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2024年第6期959-969,共11页
Chinese Journal of Luminescence
基金
广西科技基地和人才专项(2020AC18005)
广西研究生教育创新计划项目(YCSW2022267)
广西中央引导地方科技发展基金(ZY22096009)
广西八桂学者基金资助项目。
