Spectral properties of inorganic CsPbBr3 quantum dots embedded in phosphate fibers

• Published in: Journal of alloys and compounds Vol. 882; p. 160714
• Main Authors: Du, Ying, Yan, Sasa, Li, Zhengran, Sun, Yan, Wang, Xin, Chen, Liang, Tao, Yiting, Wang, Panting, Chen, Danping
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.11.2021; Elsevier BV
• Subjects: Ceramic fibers; CsPbBr3 quantum dots; Doppler effect; Emission analysis; Fiber preforms; Fibers; Glass ceramics; Heat treatment; Phosphate glass; Preparation; Quantum dots; Raman spectra; Red shift; Spectral performance; Stability; Tempering; Stability; CsPbBr3 quantum dots; Spectral performance; Preparation; Fibers
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2021.160714

•CsPbBr3 QDs fibers were prepared by the stack-draw method and heat-treatment.•CsPbBr3 QDs fibers used CsPbBr3 QDs glass as core and phosphate glass as cladding.•The formation of CsPbBr3 QDs in fibers was confirmed by Raman spectra.•The spectral properties of CsPbBr3 QDs fibers and glasses were studied and compared.•Due to the high loss of fibers near 520 nm, laser amplification was not observed. A fiber preform was attempted to prepare by the stacking method. After drawing and heat-treatment, a composite fiber with good stability was obtained using the CsPbBr3 glass ceramic as the core and the phosphate glass as the cladding. The formation of CsPbBr3 quantum dots in fibers was confirmed by Raman spectra. The results of the spectral testing indicated that the emission band of fibers after heat-treatment had the same red-shift as that of CsPbBr3 glass ceramics, but the emission peak wavelengths of the former were shorter than that of the latter. Moreover, as the length of fibers increased, the emission peak wavelength also was red-shifted. However, with the increase of heat-treatment temperature, the red-shift value of the emission peak wavelength of fibers became small as the length augmented. Due to the high loss of fibers near 520 nm, the result of laser amplification was not observed, which reflects that the preparation of fibers with short-wavelength lasers is still a challenge.