Structural, spectroscopic and temperature characterizations of Dy3+-doped CsPbBr3 quantum dots in borogermanate glass-ceramics.

Dy3+-doped borogermanate glass-ceramics with CsPbBr 3 quantum dots (QDs) were synthesized by the high-temperature melting and heat treatment methods. The structural, morphology, and luminescence temperature-sensitive properties of QDs in glass hosts were investigated using XRD, the high-resolution transmission electron microscopy (HR TEM), and temperature-dependent photoluminescence (PL) emission spectra, respectively. Strong green emission from CsPbBr 3 QDs was observed. The optimal concentration of Dy3+ ions in borogermanate glasses was also determined. The activation energy (E a) is estimated as 337.7 meV from the fitting curve of integrated PL emission intensity of CsPbBr 3 versus the reciprocal temperature. The relative sensitivity maximum value of the 0.4 mol% Dy3+-doped CsPbBr 3 QDs (CDy0.4) glasses reaches 2.39% K−1 at 298 K. The results indicate that CDy0.4 borogermanate glass-ceramics could be potentially used for high-sensitivity optical temperature sensing applications. • Dy3+-doped CsPbBr 3 quantum dots in borogermanate glasses have been fabricated. • The optical properties and microtopography of Dy3+-doped CsPbBr 3 QDs glasses is investigated. • The maximum relative sensitivity of 0.4 mol% Dy3+-doped CsPbBr 3 QDs glasses reaches 2.39% K−1 at 298 K. [ABSTRACT FROM AUTHOR]