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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Selective enrichment of Ln(3+) (Ln = Yb; Er) and Cr3+ into SrF2 and ZnAl2O4 nanocrystals precipitated in fluorosilicate glass-ceramics: A dual mode optical temperature sensing study
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Selective enrichment of Ln(3+) (Ln = Yb; Er) and Cr3+ into SrF2 and ZnAl2O4 nanocrystals precipitated in fluorosilicate glass-ceramics: A dual mode optical temperature sensing study

机译:选择性富集LN(3+)(LN = Yb; ER)和Cr3 +进入SRF2和ZNAL2O4纳米晶体中的氟硅酸盐玻璃陶瓷:双模光学温度传感研究

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摘要

The dual mode optical thermometry offers precise temperature sensing with self-calibration merit. To realise this, an oxy-fluoride precursor glass was transformed to a semi-transparent glass-ceramic having simultaneously precipitated SrF2:Yb3+/Er3+ and ZnAl2O4:Cr3+ phases. Under 980 nm excitation, intense green up-conversion (UC) luminescence of Er3+: H-2(11/2), S-4(3/2) -> I-4(15/2) and under 535 nm excitation, enhanced red down-conversion (DC) luminescence lifetime of Cr3+: E-2, T-4(2) -> (4)A(2) was realized. Both the UC and DC transitions were highly reliant upon temperature. The fluorescence intensity ratio (FIR) study of erbium's thermally coupled energy states (H-2(11/2) and S-4(3/2)) produced maximum temperature sensing sensitivity values of 1.11% K-1 at 334 K and 0.66% K-1 at 275 K, respectively. Likewise, temperature dependent luminescence lifetime of Cr3+ attributed to the transitions arising from the parity forbidden (E-2 -> (4)A(2)) and spin allowed (T-4(2) -> (4)A(2)) relaxations produced maximum temperature sensing sensitivity value equal to 0.19% K-1 at 435 K.
机译:双模光学测温仪提供了具有自校准优点的精确温度传感。为了实现这一点,将含氧氟化物前体玻璃转变为同时沉淀SrF2:Yb3+/Er3+和ZnAl2O4:Cr3+相的半透明微晶玻璃。在980nm激发下,实现了Er3+:H-2(11/2)、S-4(3/2)->I-4(15/2)的强绿色上转换(UC)发光;在535nm激发下,实现了Cr3+:E-2、T-4(2)->(4)A(2)的增强红色下转换(DC)发光寿命。UC和DC转变都高度依赖于温度。对铒的热耦合能态(H-2(11/2)和s-4(3/2))的荧光强度比(FIR)研究分别在334 K和275 K时产生了1.11%K-1和0.66%K-1的最大感温灵敏度值。同样地,Cr3+的温度依赖性发光寿命归因于宇称禁止(E-2->(4)A(2))和自旋允许(T-4(2)->(4)A(2))弛豫引起的跃迁,在435 K下产生了等于0.19%K-1的最大感温灵敏度值。

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