零维有机-无机杂化荧光粉[N(CH_(3))_(4)]_(2)GeF_(6)∶Mn^(4+)的双模温度传感应用

Luminescence of Zero-dimensional Organic-inorganic Hybrid Phosphor[N(CH_(3))_(4)]_(2)GeF_(6)∶Mn^(4+)for Dual-mode Temperature Sensing

新型低维有机-无机杂化荧光粉具有独特的光学性质和广泛的光电应用前景。本文报道了一种采用湿化学法合成的Mn^(4+)掺杂的有机-无机杂化[N(CH_(3))_(4)]_(2)GeF_(6)荧光粉材料,并采用X射线粉末衍射(XRD)、热重差热分析(TG-DTA)、红外光谱(FTIR)、漫反射光谱(DRS)、激发(PL)与发射(PLE)光谱以及荧光寿命等手段对材料的晶体结构、热稳定性和发光性能进行了系统研究。研究结果表明,室温下,该荧光粉可产生高颜色纯度的窄红色发射峰,其峰值位于630 nm。在13~292 K的温度范围内,Mn^(4+)离子的Stokes和anti-Stokes边带发光强度表现出不同的温度响应。通过应用anti-Stokes和Stokes边带的发射强度比进行温度传感,获得的最大绝对灵敏度和相对灵敏度分别为0.002 1 K^(-1)和2.11%·K^(-1)。同时,Mn^(4+)离子的荧光寿命值也可以用于温度传感,最大相对灵敏度为0.44%·K^(-1),表明该荧光粉可以用于双模温度传感研究。

Novel low-dimensional organic-inorganic hybrid phosphors have unique optical properties and wide opto-electronic applications.Zero-dimensional organic-inorganic hybrid phosphor[N(CH_(3))_(4)]_(2)GeF_(6)∶Mn^(4+)was synthesized by a wet chemical method.By using XRD,TG-DTA,FTIR,DRS,PL,PLE,and lifetime decay,the crystal struc-ture,thermal stability,and optical properties were systemically investigated.The result shows that narrow red emis-sion with high color purity can be observed even at room temperature,and the emission peak locates at 630 nm.In the temperature range of 13-292 K,anti-Stokes and Stokes sidebands of Mn^(4+)ions show different temperature re-sponses.The emission intensity ratio of anti-Stokes vs.Stokes sidebands can be used for temperature sensing,with a maximum absolute sensitivity of 0.0021 K^(−1) and relative sensitivity of 2.11%·K^(−1).Moreover,the lifetime of Mn^(4+)ions can also be used for temperature sensing with a maximum relative sensitivity of 0.44%·K^(−1),demonstrating its potential application in dual-mode optical thermometry.