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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Luminescence spectroscopy of Cr3+ ions in bulk single crystalline beta-Ga2O3
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Luminescence spectroscopy of Cr3+ ions in bulk single crystalline beta-Ga2O3

机译:散装单晶β-Ga2O3中Cr3 +离子的发光光谱法

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Detailed investigations of the spectroscopic properties of Cr(3+)ions in beta-Ga2O3:0.05% Cr(3+)single crystals grown by the floating zone technique have been performed in the temperature range 4.5-550 K. The luminescence of Cr(3+)ions at low temperatures is due to narrow R-lines (E-2 ->(4)A(2)transitions) and their vibronic sidebands, whereas the broad intense band (T-4(2)->(4)A(2)transition) dominates at temperatures above 200 K. The vibronic sidebands of R-lines with amplitude of less than 5% of the R-1-line at a temperature of 4.5 K cover the region of 700-735 nm. The temperature dependences of the luminescence intensity and the decay time of Cr(3+)ions indicate the same mechanism of quenching of R-line intensity and shortening of lifetime for(2)E of Cr(3+)ions. The temperature dependence of the R-1-line decay time of beta-Ga2O3:Cr(3+)with maximal temperature coefficient vertical bar Delta tau/Delta T vertical bar = 0.023 ms K(-1)at 120 K and maximal specific sensivitity vertical bar(Delta tau/Delta T)tau(-1)vertical bar = 0.017 K(-1)at 160 K indicates an application potential of this phosphor for low-temperature fluorescence thermometry.
机译:通过浮动区技术生长的β-GA2O3:0.05%Cr(3+)单晶的Cr(3+)离子的光谱性质的详细研究已经在4.5-550k的温度范围内进行.Cr的发光( 3+)低温下的离子是由于窄的R线(E-2 - >(4)A(2)转变)及其振动边带,而宽强度带(T-4(2) - >(4 )(2)转变)在高于200k的温度下占主导地位。R线的振动边带具有小于5%的R-1线在4.5k的温度下覆盖700-735nm的区域。 Cr(3+)离子的发光强度和衰减时间的温度依赖性表明了R线强度的淬火机制和缩短(2)Cr(3 +)离子的寿命。 β-Ga2O3的R-1线衰减时间的温度依赖性:Cr(3+)具有最大温度系数垂直条ΔTau/ delta t垂直条= 0.023ms K(-1),在120 k和最大的特定敏感度垂直条(Delta Tau /ΔT)Tau(-1)垂直条= 0.017 k(-1)160 k表示该磷光体的施用电位,用于低温荧光热量。

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