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CsPbF3 Quantum Dots and Sm3+ Ions Co-Doped Glasses: Luminescence Characteristics and Temperature Sensing Application
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DOI：10.1111/jace.70952.png)
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Abstract
En 中文
CsPbF3 perovskite quantum dots (QDs) and Sm3+ ions co-doped glass samples exhibit excellent thermal stability and appropriate attenuation of luminous intensity, demonstrating promising application potential in fluorescence intensity ratio (FIR) temperature sensing. The formation of CsPbF3 QDs was confirmed using transmission electron microscopy, and the incorporation of Sm3+ almost did not alter crystal phase of the QDs. For CsPbF3-Sm3+ co-doped samples, with increasing Sm3+ concentration, the photoluminescence excitation (PLE) spectrum of Sm3+ includes excitation spectrum component of CsPbF3 around 310 nm, and the PL intensity of CsPbF3 and lifetime obviously decrease (compared with CsPbF3 singly doped sample). These results suggest energy transfer from CsPbF3 to Sm3+. As Sm3+ concentration increases, the PL intensity of Sm3+ slightly increases and rapidly decreases, the PL lifetime of Sm3+ decreases continuously, which are attributed to concentration quenching effect by comparing to Sm3+ singly doped samples. By using co-doped sample 4CsPbF3-0.5Sm, the PL temperature characteristics are evaluated. As the temperature increases, the PL intensity of CsPbF3 QDs decreases more rapidly than that of Sm3+, and the lifetime of CsPbF3 decreases obviously. Owing to slower PL attenuation rate of CsPbF3 QDs glass (QDG) than that of CsPbX3 (X = Cl/Br, Br, I) QDGs, the high temperature limit of FIR sensing is extended to 613.15 K. The lifetime of Sm3+ is very slightly decreased with elevating temperature, which it is attributed to crossover process. The temperature-dependent FIR temperature sensing performance and temperature stability/cycling characteristics are evaluated. The results demonstrate the feasibility of employing CsPbF3-Sm3+ co-doped glass samples in temperature sensing applications.
Keywords:
co-doped glasses
CsPbF3 perovskite QDs
energy transfer
FIR temperature sensing
Sm3+ ions
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