Structural and Luminescent Properties of Sn-Doped SiO2 Layers

Komarov, F. F.; Власукова, Л. А.; Milchanin, O.; Makhavikou, M.; Пархоменко, И. Н.; Wendler, E.; Wesch, W.; Mudryi, A. V.; Ismailova, G. A.

doi:10.1007/s10812-014-9856-2

Cited by 5 publications

(3 citation statements)

References 17 publications

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“…The limit of the solid solution of Sn in SiO2 reported by Komarov et al is 4 wt%. 17 The solid solubility limit of Sn in SiO2 exceeds on adding 5 wt% Sn, and the undissolved Sn exists as a simple substance. This charge-discharge reaction between excess Sn and Na + proceeds to locally generate the stress due to volume expansion.…”

Section: Resultsmentioning

confidence: 99%

“…Hence, the discharge capacity fails to improve. In contrast, Sn is not entirely dissolved in the solid solution and exists as a simple substance 17 in the 1 wt% Sn-doped SiOx electrode. Thus, the charge-discharge reaction between Sn and Na + proceeds, and the active material is possibly pulverized owing to the large volume expansion of Sn, resulting in a low discharge capacity.…”

Section: Resultsmentioning

confidence: 99%

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Effect of Sn Addition on Anode Properties of SiOx in Sodium-Ion Batteries

et al. 2023

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Our group has investigated the properties of lithium-ion battery anodes fabricated using Sn/SiOx (SiOx is a mixed phase of Si clusters and amorphous SiO2 matrix). The addition of Sn improves the conductivity of the SiO2 matrix, while the formation of the Li + -conductive Li2Si2O5 phase in the SiO2 matrix improves Si utilization. The charge-discharge cycle life is also extended. In this study, Sn-doped SiOx has been used to fabricate the anode of a sodium-ion battery, and its charge-discharge properties are evaluated. The addition of 3 wt% Sn to SiOx improves the cycle property, as revealed by charge-discharge tests. X-ray diffraction analysis confirmed that the Na + -conductive Na2Si2O5 phase is formed during the charging and discharging processes. These results indicate that adding Sn improves the electronic conductivity of SiO2, and Na2Si2O5 facilitated the movement of Na in the SiO2 matrix. Thus, the utilization of Si is enhanced, and a high discharge capacity is achieved.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Effect of Sn Addition on Anode Properties of SiOx in Sodium-Ion Batteries

et al. 2023

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“…dopants [9]. For instance, Kachurin et al [10] observed a new optical active centre in SiO 2 implanted by Ge ions during thermal treatment, while Komarov et al [11] showed that the implantation of Sn ions in SiO 2 formed a large number of radiative centres after heat treatment.…”

Section: Introductionmentioning

confidence: 99%

White luminescence from sol–gel silica doped with silver

Abbass

Swart

Kroon

2015

J Sol-Gel Sci Technol

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Undoped silica and Ag-doped silica (SiO 2 ) were synthesized by the sol-gel method. The photoluminescence properties as a function of annealing temperature were investigated in detail. The addition of Ag introduced new optical active centres in the sample annealed at 1000°C, responsible for emission bands at 2.25 eV (550 nm) and 3.26 eV (380 nm) in the SiO 2 luminescence spectrum. These new emission bands were related to excess oxygen due to decomposition of Ag 2 O at high temperatures. The additional luminescence band at 2.25 eV changed the blue emission from pure SiO 2 to near white light from Ag-doped SiO 2 , suggesting that the SiO 2 :Ag system may be suitable for solidstate lighting applications. The stability of this phosphor under ultraviolet irradiation was investigated. Graphical Abstract

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