Structural transformations and optical properties of glass-ceramics based on ZnO, β- and α-Zn2SiO4 nanocrystals and doped with Er2O3 and Yb2O3: Part I. The role of heat-treatment

Loiko, Pavel; Дымшиц, О. С.; Volokitina, Anna; Алексеева, И. П.; Shemchuk, D. V.; Tsenter, M. Ya.; Bachina, A. K.; Khubetsov, Alexander; Vilejshikova, Elena; Петров, П. А.; Баранов, А. В.; Жилин, А. А.

doi:10.1016/j.jlumin.2018.05.010

Cited by 24 publications

(9 citation statements)

References 55 publications

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“…At 700 °C, several diffraction peaks started to appear, indicating the formation of zinc silicate crystals. Diffraction indicated the crystalline phase existed inside the glass structure [20]. There were seven major zinc silicate peaks formed at 2θ = 22.75°, 25.62°, 31.63°, 34.72°, 38.92°, 49.07° and 65.87°, which were proven by standard diffraction pattern of…”

Section: X-ray Diffraction (Xrd) Analysismentioning

confidence: 76%

“…However, the structure change started to take place when the heat-treatment temperature was increased to 700 • C. Figure 2 shows that crystallization started to occur at the higher temperature of 700 • C. At 700 • C, several diffraction peaks started to appear, indicating the formation of zinc silicate crystals. Diffraction indicated the crystalline phase existed inside the glass structure [20] [21]. In terms of the different heat-treatment temperature applied, the increased of heat-treatment temperature caused higher diffusion of ions inside the sample, thus increasing the atomic mobility, which then accelerated the rate of crystal growth [22].…”

Section: X-ray Diffraction (Xrd) Analysismentioning

confidence: 99%

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Phase Transformation, Optical and Emission Performance of Zinc Silicate Glass-Ceramics Phosphor Derived from the ZnO–B2O3–SLS Glass System

et al. 2020

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A new transparent zinc silicate glass-ceramic was derived from the 55ZnO–5B2O3–40SLS glass system via a controlled heat-treatment method. The precursor glass sample was placed through the heat-treatment process at different temperatures to study the progress in phase transformation, optical performance and emission intensity of the zinc silicate glass-ceramics. For this project, material characterization was measured through several tests using densimeter and linear shrinkage measurement, X-ray diffraction (XRD), Fourier transform infrared reflection (FTIR), ultraviolet–visible (UV–Vis) and photoluminescence (PL) spectroscopy. The density and linear shrinkage measurements show that the density of the particular glass-ceramic samples increases with the progression of heating temperature. The XRD analysis displays the result in which the zinc silicate crystal starts to grow after the sample was treated at 700 °C. In addition, the FTIR spectra indicated that the crystallization of the zinc silicate phase occurred with the appearance of SiO4, ZnO4 and Si-O-Zn bands. UV–visible exhibited the small changes when the value for the optical band gap decreased from 3.867 to 3.423 eV, influenced by the temperature applied to the sample. Furthermore, the PL spectroscopy showed an enhancement of broad green emission at 534 nm upon the increased heat-treatment temperature. Thus, it can be concluded there is the progression of crystal growth as the heat-treatment temperature increased; three emission peaks appeared at 529, 570 and 682 nm for the green, yellow and red emissions, respectively.

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Section: X-ray Diffraction (Xrd) Analysismentioning

confidence: 76%

Section: X-ray Diffraction (Xrd) Analysismentioning

confidence: 99%

Phase Transformation, Optical and Emission Performance of Zinc Silicate Glass-Ceramics Phosphor Derived from the ZnO–B2O3–SLS Glass System

et al. 2020

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“…[ 19 ] Similar redshift phenomenon in absorption and PL had been reported from semiconductor QDs‐embedded glasses. [ 25–28 ] Based on the diffusion‐controlled nucleation, the lift of heating temperature or durability will bring about the growth and augment in the mean size of QDs, leading to the drop of the effective bandgap energy and the redshift of both PL and absorption peaks of QDs owing to the quantum confinement effect, [ 26–31 ] which proves the ability to tune the effective bandgap energies of CsPb(Br/I) 3 NCs through heat treatment. Among these samples, when the heat treatment temperature was higher than 520 °C, the rising trend disappeared, which might demonstrate the optimal temperature is 520 °C.…”

Section: Resultsmentioning

confidence: 99%

Composition Optimization of Multifunctional CsPb(Br/I)₃ Perovskite Nanocrystals Glasses with High Photoluminescence Quantum Yield

Wang

Jin

Chen

et al. 2021

Advanced Optical Materials

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manifested prominent optical performance, such as extreme narrow full width at half maximum (FWHM), high PLQY (up to 90%), tunable emissive color covering a visible full-spectral range, and high defect tolerance over the past decade, rendering them high value for applications in LED. [5][6][7][8][9][10][11] But on the other hand, the intrinsic instability of perovskite quantum dots (PQDs) poses a threat to further development against the water and thermal. [12] Apart from these, the defects of anion exchange are still an urgent problem which impedes many practical applications. [13] Therefore, lots of researchers have adopted various methods to improve the stability of perovskite quantum dots such as embedding QDs in a polymeric matrix like polystyrene, the inorganic matrices like zeolites, poly(methyl methacrylate) (PMMA), or mesoporous silica. [5,[14][15][16] Fortunately, embedding CsPbX 3 PQDs into inorganic oxide glasses through in situ nucleation/growth has been verified to be a feasible alternative to promote stability and effectively protect robust glass matrix mechanisms. [17][18][19] However, the PLQY value of the CsPbX 3 NCs glasses is still low compared to that of the corresponding colloidal PQDs counterparts, especially for CsPb(Br/I) 3 and CsPbI 3 . [20] In addition, the external quantum efficiency of perovskite NCs based LED is closely related to the PLQY, [21] so obtaining a high PLQY of CsPbX 3 NCs glasses has become another chase. The highest PLQY of 81% reported was for CsPbBr 3 NCs glasses, which was realized in boron-germanium glass. The PLQY value of CsPb(Br/I) 3 PQDs embedded in glasses is merely 20%, and the value for CsPbI 3 and CsPbCl 3 PQDs in glass has not been reported nevertheless. [22] Red-emitting pure CsPbI 3 PQDs glasses were prepared by Xiang's group in 2017, but its PLQY was of only 4.2% owing to the existence of structural defect and electron-hole in CsPbI 3 NCs glass. [23] Song and co-workers raised a one-pot preparation method to fabricate CsPb(Br/I) 3 @anthracene-based white LED (wLED) composites. The as-fabricated white lightemitting composite exhibited a PLQY of 41.9%. [24] A versatile devitrification of CsPb(Br/I) 3 NCs was reported in boro-germanate glasses matrix with a PLQY of 20-25%. [22] Fluoride additives were introduced into an oxyhalide borosilicate glass matrix for breaking the tight glass network structure, which promoted the nucleation of CsPb(Br/I) 3 NCs inside the glass. The PLQY of CsPb(Br/I) 3 NCs glasses reached 50-60%, which was the highest Currently, high optical purity, perfect stability, and high photoluminescence quantum yield (PLQY) are very important, being the key to obtain highquality luminescent materials. The research of perovskite nanocrystals (NCs) as optical materials is in full swing. Nevertheless, the low PLQY value, especially for the red-emitting perovskite NCs, is a main obstacle to applications in display. This work reports the optimized components to synthesize CsPb(Br/I) 3 NCs glasses whose PLQY achieves a big boost from 15.4% to ≈60%...

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“…Crystallization occurs within the liquid phase-separated regions. The spinodal character of decomposition at melt quenching and annealing does not exclude the formation of a droplet structure at later stages of phase transformation during subsequent heat-treatments [66]. Crystallization occurs independently in each droplet.…”

Section: Glasses and Glass-ceramicsmentioning

confidence: 99%

Transparent materials based on semiconducting ZnO: glass-ceramics and optical ceramics doped with rare-earth and transition-metal ions

Дымшиц

Gorokhova

Алексеева

et al. 2022

Journal of Non-Crystalline Solids

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Structural transformations and optical properties of glass-ceramics based on ZnO, β- and α-Zn2SiO4 nanocrystals and doped with Er2O3 and Yb2O3: Part I. The role of heat-treatment

Cited by 24 publications

References 55 publications

Phase Transformation, Optical and Emission Performance of Zinc Silicate Glass-Ceramics Phosphor Derived from the ZnO–B2O3–SLS Glass System

Phase Transformation, Optical and Emission Performance of Zinc Silicate Glass-Ceramics Phosphor Derived from the ZnO–B2O3–SLS Glass System

Composition Optimization of Multifunctional CsPb(Br/I)₃ Perovskite Nanocrystals Glasses with High Photoluminescence Quantum Yield

Transparent materials based on semiconducting ZnO: glass-ceramics and optical ceramics doped with rare-earth and transition-metal ions

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Structural transformations and optical properties of glass-ceramics based on ZnO, β- and α-Zn2SiO4 nanocrystals and doped with Er2O3 and Yb2O3: Part I. The role of heat-treatment

Cited by 24 publications

References 55 publications

Phase Transformation, Optical and Emission Performance of Zinc Silicate Glass-Ceramics Phosphor Derived from the ZnO–B2O3–SLS Glass System

Phase Transformation, Optical and Emission Performance of Zinc Silicate Glass-Ceramics Phosphor Derived from the ZnO–B2O3–SLS Glass System

Composition Optimization of Multifunctional CsPb(Br/I)3 Perovskite Nanocrystals Glasses with High Photoluminescence Quantum Yield

Transparent materials based on semiconducting ZnO: glass-ceramics and optical ceramics doped with rare-earth and transition-metal ions

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Product

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Composition Optimization of Multifunctional CsPb(Br/I)₃ Perovskite Nanocrystals Glasses with High Photoluminescence Quantum Yield