Abstract
CsPbBr₃ perovskite quantum dot (PQD)-doped borosilicate glasses were successfully prepared using a melt-quenching-annealing method. The influence of Al₂O₃ concentration on the glass network structure and optical properties was systematically investigated. The results indicate that with increasing Al₂O₃ concentration, the fluorescence peak of the CsPbBr₃ PQD glass exhibits a redshift, and the fluorescence lifetime increases from105.43 ns to 125.42 ns. The fluorescence intensity first increases and then decreases, reaching its maximum at an Al₂O₃ concentration of 3 mol%. Al₂O₃ doping induces relaxation of the glass network, reducing the ion migration barrier and thereby promoting the nucleation and growth of PQDs. Furthermore, Sm³⁺-doped CsPbBr₃ PQD glass was prepared, and its temperature sensing properties were investigated. The relative sensitivity Sr ranges from 0.0271 to 0.0580 K-1 and the absolute sensitivity Sa ranges from 0.0148 to 0.149 K-1 , indicating excellent temperature sensing performance based on fluorescence intensity ratio, which shows great potential for applications in self-calibrated temperature sensors and related fields.