Radiative Defect Varying in Aging ZnO:Ag Nanocrystals

T. V. Torchynska; B. El Filali; G. Polupan; L. Shcherbyna

doi:10.1007/s11664-018-6096-x

Radiative Defect Varying in Aging ZnO:Ag Nanocrystals

T. V. Torchynska, B. El Filali, G. Polupan, L. Shcherbyna

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

ZnO nanocrystal (NC) films prepared by ultrasonic spray pyrolysis and doped with Ag have been studied in as-grown and aged states. Photoluminescence (PL) and x-ray photo electronic spectroscopy (XPS) have been used in this study. PL spectra of as-grown ZnO:Ag NCs include a number of PL bands peaking at: 3.18 eV, 2.85 eV, 2.70 eV, 2.50 eV and 2.10 eV. It is revealed that the 2.70 eV and 2.85 eV PL bands are connected with Ag-doping ZnO NCs. PL intensities of the first three PL bands decline at aging, but the PL intensity of the orange PL band increases. This last fact indicates that aging at 300 K is connected with increasing the concentration of oxygen interstitials in ZnO NC films. In XPS research, the variation of substitutional Ag_Zn defects and the formation of Ag-O bounds at aging have been detected. The nature of optical transitions and radiative defects varying at aging have been analyzed and discussed.

Original language	English
Pages (from-to)	4234-4238
Number of pages	5
Journal	Journal of Electronic Materials
Volume	47
Issue number	8
DOIs	https://doi.org/10.1007/s11664-018-6096-x
State	Published - 1 Aug 2018

Keywords

Ag defect modification
Ag-O bounds
Photoluminescence
ZnO:Ag nanocrystal films
aging

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title = "Radiative Defect Varying in Aging ZnO:Ag Nanocrystals",

abstract = "ZnO nanocrystal (NC) films prepared by ultrasonic spray pyrolysis and doped with Ag have been studied in as-grown and aged states. Photoluminescence (PL) and x-ray photo electronic spectroscopy (XPS) have been used in this study. PL spectra of as-grown ZnO:Ag NCs include a number of PL bands peaking at: 3.18 eV, 2.85 eV, 2.70 eV, 2.50 eV and 2.10 eV. It is revealed that the 2.70 eV and 2.85 eV PL bands are connected with Ag-doping ZnO NCs. PL intensities of the first three PL bands decline at aging, but the PL intensity of the orange PL band increases. This last fact indicates that aging at 300 K is connected with increasing the concentration of oxygen interstitials in ZnO NC films. In XPS research, the variation of substitutional AgZn defects and the formation of Ag-O bounds at aging have been detected. The nature of optical transitions and radiative defects varying at aging have been analyzed and discussed.",

keywords = "Ag defect modification, Ag-O bounds, Photoluminescence, ZnO:Ag nanocrystal films, aging",

author = "Torchynska, {T. V.} and {El Filali}, B. and G. Polupan and L. Shcherbyna",

note = "Publisher Copyright: {\textcopyright} 2018, The Minerals, Metals & Materials Society.",

year = "2018",

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doi = "10.1007/s11664-018-6096-x",

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T1 - Radiative Defect Varying in Aging ZnO:Ag Nanocrystals

AU - Torchynska, T. V.

AU - El Filali, B.

AU - Polupan, G.

AU - Shcherbyna, L.

PY - 2018/8/1

Y1 - 2018/8/1

N2 - ZnO nanocrystal (NC) films prepared by ultrasonic spray pyrolysis and doped with Ag have been studied in as-grown and aged states. Photoluminescence (PL) and x-ray photo electronic spectroscopy (XPS) have been used in this study. PL spectra of as-grown ZnO:Ag NCs include a number of PL bands peaking at: 3.18 eV, 2.85 eV, 2.70 eV, 2.50 eV and 2.10 eV. It is revealed that the 2.70 eV and 2.85 eV PL bands are connected with Ag-doping ZnO NCs. PL intensities of the first three PL bands decline at aging, but the PL intensity of the orange PL band increases. This last fact indicates that aging at 300 K is connected with increasing the concentration of oxygen interstitials in ZnO NC films. In XPS research, the variation of substitutional AgZn defects and the formation of Ag-O bounds at aging have been detected. The nature of optical transitions and radiative defects varying at aging have been analyzed and discussed.

AB - ZnO nanocrystal (NC) films prepared by ultrasonic spray pyrolysis and doped with Ag have been studied in as-grown and aged states. Photoluminescence (PL) and x-ray photo electronic spectroscopy (XPS) have been used in this study. PL spectra of as-grown ZnO:Ag NCs include a number of PL bands peaking at: 3.18 eV, 2.85 eV, 2.70 eV, 2.50 eV and 2.10 eV. It is revealed that the 2.70 eV and 2.85 eV PL bands are connected with Ag-doping ZnO NCs. PL intensities of the first three PL bands decline at aging, but the PL intensity of the orange PL band increases. This last fact indicates that aging at 300 K is connected with increasing the concentration of oxygen interstitials in ZnO NC films. In XPS research, the variation of substitutional AgZn defects and the formation of Ag-O bounds at aging have been detected. The nature of optical transitions and radiative defects varying at aging have been analyzed and discussed.

KW - Ag defect modification

KW - Ag-O bounds

KW - Photoluminescence

KW - ZnO:Ag nanocrystal films

KW - aging

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DO - 10.1007/s11664-018-6096-x

M3 - Artículo

SN - 0361-5235

VL - 47

SP - 4234

EP - 4238

JO - Journal of Electronic Materials

JF - Journal of Electronic Materials

IS - 8

ER -

Radiative Defect Varying in Aging ZnO:Ag Nanocrystals

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Keywords

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