Transparent glass–ceramics based on ZnO and ZnO:Co^2+ nanocrystals

Алексеева, И. П.; Дымшиц, О. С.; Жилин, А. А.; Запалова, С. С.; Shemchuk, D. V.

doi:10.1364/jot.81.000723

Cited by 18 publications

(11 citation statements)

References 17 publications

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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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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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“…The 27 Al high-resolution NMR experiments have been conducted at 20.0 T (850 MHz) on a Bruker AVANCE spectrometer equipped with high-speed MAS probe head (spinning rates 30 kHz, aluminum free zirconia rotors of 2.5 mm diameter). 1D MAS spectra have been acquired after a single short pulse (p/10) ensuring a quantitative excitation and quantification of 27 Al central transition. Chemical shifts were referenced relative to Al(NO3)3 1M solution.…”

Section: High Resolution Solid State Nmr Spectroscopymentioning

confidence: 99%

“…The ZnO-Al2O3-SiO2 (ZAS) system is important in many applications of functional glassceramics due to the opportunity to crystallize gahnite (ZnAl2O4) [23][24] [14] or willemite (Zn2SiO4) [25][26]. Zincite (ZnO) can also crystallize in more chemically complex glasses [27].…”

Section: Introductionmentioning

confidence: 99%

Vitrification, crystallization behavior and structure of zinc aluminosilicate glasses

Cormier¹,

Delbes²,

Montouillout³

2021

Journal of Non-Crystalline Solids

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The glass formation, crystallization behavior and structure were investigated in the ZnO-Al2O3-SiO2 system. The boundaries of the glass forming region are defined, indicating the absence of glasses along the ZnO-SiO2 binary and the role of Al to improve glass formation.The crystallization behavior has been clarified for representative glass compositions showing first crystallization of willemite near the ZnO-SiO2 binary and a metastable zinc aluminosilicate solid solution for higher Al2O3/SiO2 content. Gahnite appears as a second phase and is mainly present near the center of the tectosilicate join. Glass structure was studied using 27 Al NMR spectroscopy, neutron and X-ray diffraction and molecular dynamics simulation. Both Al and Zn are shown to be distributed between four-fold and five-fold sites. The proportion of [4] Al is more important near the ZnAl2O4-SiO2 join. A remarkable similar behavior is revealed for the glass forming ability and structural properties between MgO and ZnO aluminosilicate systems.

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“…The glass with the composition (wt%) 15K 2 O-30ZnO-16Al 2 O 3 -39SiO 2 [15,16] was doped with 0.05 or 0.1 wt% CoO. The starting materials for the glass preparation included reagent grade K 2 CO 3 , ZnO, Al 2 O 3 and SiO 2 .…”

Section: Synthesis Of Glass-ceramicsmentioning

confidence: 99%

“…This is actually the band intended to be used for Q-switching of erbium lasers. The above-mentioned spectral changes indicate an appearance of undistorted tetrahedrally coordinated Co 2+ ions in ZnO nanocrystals at the expense of the Co 2+ ions located in the initial glass.They are clearly connected with the ZnO crystallization and entering the Co 2+ ions in its structure in the positions of Zn 2+ ions [15,16,30]. The increase of fraction of ZnO is accompanied by the increase of absorption of tetrahedrally coordinated Co 2+ ions.…”

Section: Optical Absorptionmentioning

confidence: 99%

Structure and nonlinear optical properties of novel transparent glass-ceramics based on Co²⁺:ZnO nanocrystals

et al. 2016

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Transparent glass-ceramics (GCs) based on Co 2+ :ZnO nanocrystals (mean diameter, 11 nm) are synthesized on the basis of cobalt-doped glasses of the K 2 O-ZnO-Al 2 O 3 -SiO 2 system. For these GCs, the absorption band related to the 4 A 2 ( 4 F) → 4 T 1 ( 4 F) transition of Co 2+ ions in tetrahedral sites spans until ~1.73 μm. Saturation of the absorption is demonstrated at 1.54 μm, with a saturation fluence F s = 0.8 ± 0.1 Jcm −2 (σ GSA = 1.7 ± 0.2 × 10 −19 cm 2 ) and a recovery time of 890 ± 10 ns. Passive Q-switching of an Er,Yb:glass laser is realized with the synthesized GCs. This laser generated 0.37 mJ/100 ns pulses at 1.54 μm. The developed GCs are promising as saturable absorbers for 1.6-1.7 μm crystalline erbium lasers.

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Transparent glass–ceramics based on ZnO and ZnO:Co^2+ nanocrystals

Cited by 18 publications

References 17 publications

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

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

Vitrification, crystallization behavior and structure of zinc aluminosilicate glasses

Structure and nonlinear optical properties of novel transparent glass-ceramics based on Co²⁺:ZnO nanocrystals

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Transparent glass–ceramics based on ZnO and ZnO:Co^2+ nanocrystals

Cited by 18 publications

References 17 publications

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

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

Vitrification, crystallization behavior and structure of zinc aluminosilicate glasses

Structure and nonlinear optical properties of novel transparent glass-ceramics based on Co2+:ZnO nanocrystals

Contact Info

Product

Resources

About

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

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

Structure and nonlinear optical properties of novel transparent glass-ceramics based on Co²⁺:ZnO nanocrystals