Effect of ZnO on the phase transformation and optical properties of silicate glass frits using rice husk ash as a SiO2 source

Wahab, Siti Aisyah Abdul; Матори, Хамирул Амин; Sidek, H.A.A.; Zaid, Mohd Hafiz Mohd; Kechik, Mohd Mustafa Awang; Azman, Aisyah Zakiah Khirel; Khaidir, Rahayu Emilia Mohamed; Khiri, Mohammad Zulhasif Ahmad; Effendy, Nuraidayani

doi:10.1016/j.jmrt.2020.08.005

Cited by 35 publications

(8 citation statements)

References 42 publications

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“…26,69,71 The Zn−O−Si vibration is assigned near 670 cm −1 on the basis of the literature. 72 The absence of the 960 cm −1 peak in the Si 2 @ZnO slow indicates the lack of (residual) silane grafted to ZnO NCs. The weak and broad band at 880 cm −1 , occurring in unmodified ZnO NCs is ascribed to ν 2 and ν 4 bending modes of CO 3 2,73,74 due to CO 2 adsorption on the zinc oxide surface, forming chelating or bridging carbonate species.…”

Section: Methodsmentioning

confidence: 99%

Band Gap Narrowing in Silane-Grafted ZnO Nanocrystals. A Comprehensive Study by Wide-Angle X-ray Total Scattering Methods

et al. 2021

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Zinc oxide (ZnO) is a largely investigated semiconducting nanomaterial for photocatalytic applications and is an excellent active layer candidate in photovoltaics. Among native defects, having a primary role in ZnO optoelectronic properties, the influence of nearly ubiquitous planar faults of wurtzite sequences in ultrasmall (≤5 nm) nanocrystals (NCs) remains poorly understood. Here, we present a thorough study of ZnO NCs prepared under morphological control of covalently grafted vinyltrimethoxysilane (VTMS) and exhibiting either narrowing or widening of the band gap upon NCs downsizing, depending on the NC growth rate. By using synchrotron X-ray total scattering data, atomistic models and the Debye Scattering Equation (DSE) method, complemented by spectroscopic (FTIR and UV−vis) investigations, we provide a comprehensive quantitative picture in which effects from planar defects are disentangled from those due to NC size, morphology, and lattice strain (here controlled by preferential binding of VTMS on the ZnO basal faces). When faults occur in high concentration (linear density up to 1.6 × 10 6 cm −1 ), NCs exhibit optical band gap narrowing (3.27 eV vs 3.37 eV in bulk ZnO), whereas gap widening (3.52 eV) is observed at a lower density (0.8 × 10 6 cm −1 ), at which quantum-size confinement effects prevail. Supported by photoluminescence and photodegradation experiments, surface defect passivation by VTMS, affecting visible emissions and photocatalytic properties of ZnO, is also discussed in relation to silane coating and fault-driven bandgap. This work sheds light on the complex interplay among planar defects, quantum size effect, and surface modifications in ultrasmall ZnO NCs and on the importance of advanced X-ray total scattering methods toward atomically precise control of defects in nanostructures. 46Relevant cases of study and application include the following: 47 aminopropyltriethoxysilane (APTS-modified ZnO NCs were 48 implemented as the active layer of new hybrid light emitting 49 devices with optimized performances) 31 and 3-aminopropyl-50 trimethoxysilane (APTMS-grafted ZnO NCs were successfully 51 used as the electron transport layer in inverted organic solar 52 cells, with very promising results for roll-to-roll printing 53 photovoltaics); 32 vinyltrimethoxysilane (VTMS) 29 and 3-54 (trimethoxysilyl)propylmetacrylate (MPS), 28 with enhanced 55 photoluminescence; the hydrophobic hexadecyltrimethoxysi-56 lane (HDS) and hydrophilic APTS bilayers with high stability 57 in aqueous media and tunable fluorescence for tissue 58 imaging; 15 the 3-(glycidyloxypropyl)trimethoxysilane 59 (GPTMS) showing increased antibacterial activity and 60 cytotoxicity in human cancer cells at very small NPs size. 30

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Section: Methodsmentioning

confidence: 99%

Band Gap Narrowing in Silane-Grafted ZnO Nanocrystals. A Comprehensive Study by Wide-Angle X-ray Total Scattering Methods

et al. 2021

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“…The addition of zinc oxide can increase the concentration of non-bridging oxygen in the glass, which could lead to the modification of optical properties. 22 For instance, Ma et al reported the influence of ZnO on the crystallization behavior and photoluminescence (PL) properties of PbSe QDs in silicate glasses. 23 Jin et al reported the inhibition of self-crystallization of CsPbBr 3 QDs in a borosilicate glass doped with ZnO modulation.…”

Section: Introductionmentioning

confidence: 99%

“…Metal oxides like ZnO have been known as glass network intermediate, which have a great influence on the crystallization and properties of glass system. The addition of zinc oxide can increase the concentration of non‐bridging oxygen in the glass, which could lead to the modification of optical properties 22 . For instance, Ma et al reported the influence of ZnO on the crystallization behavior and photoluminescence (PL) properties of PbSe QDs in silicate glasses 23 .…”

Section: Introductionmentioning

confidence: 99%

Effect of ZnO on the crystallization and photoluminescence of CsPbI₃ perovskite quantum dots in borosilicate glasses

Chen

Xia

et al. 2022

J Am Ceram Soc

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CsPbI 3 perovskite quantum dots (QDs) doped borosilicate glass was prepared by the process of melt-quenching and subsequent annealing. With the introduction of ZnO to the parent glass as the glass network intermediate, the optical properties of the resultant samples are dramatically enhanced. Both the photoluminescence (PL) intensity and photoluminescence quantum yield (PLQY) shows a strong dependence on ZnO concentration as ZnO is found to facilitate the precipitated of the QDs by reducing the connectivity of three-dimensional glass network built from SiO 4 tetrahedrons. The tunable visible-band PL emission of the CsPbI 3 QD-doped glass could find potential applications in white LEDs and lasers.

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“…As such, numerous efforts have been conducted to overcome the addressed ZnO enhancement demands, wherein ZnO film is doped with more than a few elements; for instance, Ce, B, Al, Ga, In, etc. [10][11][12][13][14][15]. Among these, ZnO doped with Al has exhibited thought provoking features in optoelectronic applications [16].…”

Section: Introductionmentioning

confidence: 99%

In-Depth Optical Analysis of Zn(Al)O Mixed Metal Oxide Film-Based Zn/Al-Layered Double Hydroxide for TCO Application

Salih¹,

Ramizy

Aldaghri

et al. 2022

Crystals

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In this article, an in-depth optical investigation of Zn(Al)O-mixed metal oxide (MMO) film using Zn/Al-layered double hydroxide (LDH) was elucidated through co-precipitation and spin coating techniques. The field emission scanning electron microscopy (FE-SEM) analysis revealed the occurrence of a vertically aligned sheet-like structure with a thickness of 60 nm for pristine LDH, which further reduced to 45 nm after calcination at 300 °C. Additionally, pristine LDH showed multiple optical bandgaps of 5.18, 3.6, and 3.2 eV. Moreover, a good agreement of the obtained optical bandgaps was attained between both utilized methods, ultraviolet-visible light (UV-Vis), and photoluminescence (PL) spectroscopies. The optical bandgap decreased at higher calcination temperatures, which indicates the active role of the applied post-fabrication process on the optical profile of the deposited MMO film/s. The demonstrated transmittance spectra of the deposited MMO films exhibited a transparency between 85% and 95%; this indicates the usefulness and consistency of the proposed film for transparent conductive oxide (TCO) based optoelectronic applications.

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Effect of ZnO on the phase transformation and optical properties of silicate glass frits using rice husk ash as a SiO2 source

Cited by 35 publications

References 42 publications

Band Gap Narrowing in Silane-Grafted ZnO Nanocrystals. A Comprehensive Study by Wide-Angle X-ray Total Scattering Methods

Band Gap Narrowing in Silane-Grafted ZnO Nanocrystals. A Comprehensive Study by Wide-Angle X-ray Total Scattering Methods

Effect of ZnO on the crystallization and photoluminescence of CsPbI₃ perovskite quantum dots in borosilicate glasses

In-Depth Optical Analysis of Zn(Al)O Mixed Metal Oxide Film-Based Zn/Al-Layered Double Hydroxide for TCO Application

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Effect of ZnO on the phase transformation and optical properties of silicate glass frits using rice husk ash as a SiO2 source

Cited by 35 publications

References 42 publications

Band Gap Narrowing in Silane-Grafted ZnO Nanocrystals. A Comprehensive Study by Wide-Angle X-ray Total Scattering Methods

Band Gap Narrowing in Silane-Grafted ZnO Nanocrystals. A Comprehensive Study by Wide-Angle X-ray Total Scattering Methods

Effect of ZnO on the crystallization and photoluminescence of CsPbI3 perovskite quantum dots in borosilicate glasses

In-Depth Optical Analysis of Zn(Al)O Mixed Metal Oxide Film-Based Zn/Al-Layered Double Hydroxide for TCO Application

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Effect of ZnO on the crystallization and photoluminescence of CsPbI₃ perovskite quantum dots in borosilicate glasses