Room-temperature synthesis and optical properties of nanostructured Ba-Doped ZnO thin films

C. C. Okorieimoh; Ugochi Chime; Agnes C. Nkele; Assumpta C. Nwanya; Itani Given Madiba; A. K.H. Bashir; Subelia Botha; Paul U. Asogwa; Malik Maaza; Fabian I. Ezema

doi:10.1016/j.spmi.2019.05.010

Room-temperature synthesis and optical properties of nanostructured Ba-Doped ZnO thin films

C. C. Okorieimoh, Ugochi Chime, Agnes C. Nkele, Assumpta C. Nwanya, Itani Given Madiba, A. K.H. Bashir, Subelia Botha, Paul U. Asogwa, Malik Maaza, Fabian I. Ezema

Technological University Dublin

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

Abstract

Zinc oxide films with and without barium-doping have been prepared by the SILAR technique at different concentrations (1 mol%, 3 mol%, 5 mol% and 7 mol%) of Ba content on glass slides. The effects of the concentration of barium doped zinc oxide (BaZnO) were characterized using x-ray difffractometry (XRD), scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDX), transmission electron microscopy (TEM), selected area electron diffraction (SAED) techniques, ultraviolet–visible spectroscopy and photoluminescence (PL) studies. The structural studies using XRD plots confirmed the polycrystalline nature of ZnO films. The Ba doped ZnO films deposited were found to have strong orientation at (002) lattice plane which exhibited polycrystalline hexagonal wurtzite structure. TEM and SAED results confirmed the morphological and structural properties of the films. The SEM showed that the grain size of the films increased as a result of increase in the concentration of barium doping. EDX results confirmed the elemental presence of the films. An increase in the Ba concentration showed a decrease in the optical band gap values between 3.41 eV and 3.19 eV. PL studies confirmed the presence of defects in the ZnO films.

Original language	English
Pages (from-to)	321-331
Number of pages	11
Journal	Superlattices and Microstructures
Volume	130
DOIs	https://doi.org/10.1016/j.spmi.2019.05.010
Publication status	Published - 21 Jun 2019

Keywords

BaZnO
Optical properties
SEM
SILAR technique
Thin films
XRD

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10.1016/j.spmi.2019.05.010

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@article{d9a48a25de9b423895251bd47b4bb328,

title = "Room-temperature synthesis and optical properties of nanostructured Ba-Doped ZnO thin films",

abstract = "Zinc oxide films with and without barium-doping have been prepared by the SILAR technique at different concentrations (1 mol\%, 3 mol\%, 5 mol\% and 7 mol\%) of Ba content on glass slides. The effects of the concentration of barium doped zinc oxide (BaZnO) were characterized using x-ray difffractometry (XRD), scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDX), transmission electron microscopy (TEM), selected area electron diffraction (SAED) techniques, ultraviolet–visible spectroscopy and photoluminescence (PL) studies. The structural studies using XRD plots confirmed the polycrystalline nature of ZnO films. The Ba doped ZnO films deposited were found to have strong orientation at (002) lattice plane which exhibited polycrystalline hexagonal wurtzite structure. TEM and SAED results confirmed the morphological and structural properties of the films. The SEM showed that the grain size of the films increased as a result of increase in the concentration of barium doping. EDX results confirmed the elemental presence of the films. An increase in the Ba concentration showed a decrease in the optical band gap values between 3.41 eV and 3.19 eV. PL studies confirmed the presence of defects in the ZnO films.",

keywords = "BaZnO, Optical properties, SEM, SILAR technique, Thin films, XRD",

author = "Okorieimoh, \{C. C.\} and Ugochi Chime and Nkele, \{Agnes C.\} and Nwanya, \{Assumpta C.\} and Madiba, \{Itani Given\} and Bashir, \{A. K.H.\} and Subelia Botha and Asogwa, \{Paul U.\} and Malik Maaza and Ezema, \{Fabian I.\}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = jun,

day = "21",

doi = "10.1016/j.spmi.2019.05.010",

language = "English",

volume = "130",

pages = "321--331",

journal = "Superlattices and Microstructures",

issn = "0749-6036",

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TY - JOUR

T1 - Room-temperature synthesis and optical properties of nanostructured Ba-Doped ZnO thin films

AU - Okorieimoh, C. C.

AU - Chime, Ugochi

AU - Nkele, Agnes C.

AU - Nwanya, Assumpta C.

AU - Madiba, Itani Given

AU - Bashir, A. K.H.

AU - Botha, Subelia

AU - Asogwa, Paul U.

AU - Maaza, Malik

AU - Ezema, Fabian I.

PY - 2019/6/21

Y1 - 2019/6/21

N2 - Zinc oxide films with and without barium-doping have been prepared by the SILAR technique at different concentrations (1 mol%, 3 mol%, 5 mol% and 7 mol%) of Ba content on glass slides. The effects of the concentration of barium doped zinc oxide (BaZnO) were characterized using x-ray difffractometry (XRD), scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDX), transmission electron microscopy (TEM), selected area electron diffraction (SAED) techniques, ultraviolet–visible spectroscopy and photoluminescence (PL) studies. The structural studies using XRD plots confirmed the polycrystalline nature of ZnO films. The Ba doped ZnO films deposited were found to have strong orientation at (002) lattice plane which exhibited polycrystalline hexagonal wurtzite structure. TEM and SAED results confirmed the morphological and structural properties of the films. The SEM showed that the grain size of the films increased as a result of increase in the concentration of barium doping. EDX results confirmed the elemental presence of the films. An increase in the Ba concentration showed a decrease in the optical band gap values between 3.41 eV and 3.19 eV. PL studies confirmed the presence of defects in the ZnO films.

AB - Zinc oxide films with and without barium-doping have been prepared by the SILAR technique at different concentrations (1 mol%, 3 mol%, 5 mol% and 7 mol%) of Ba content on glass slides. The effects of the concentration of barium doped zinc oxide (BaZnO) were characterized using x-ray difffractometry (XRD), scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDX), transmission electron microscopy (TEM), selected area electron diffraction (SAED) techniques, ultraviolet–visible spectroscopy and photoluminescence (PL) studies. The structural studies using XRD plots confirmed the polycrystalline nature of ZnO films. The Ba doped ZnO films deposited were found to have strong orientation at (002) lattice plane which exhibited polycrystalline hexagonal wurtzite structure. TEM and SAED results confirmed the morphological and structural properties of the films. The SEM showed that the grain size of the films increased as a result of increase in the concentration of barium doping. EDX results confirmed the elemental presence of the films. An increase in the Ba concentration showed a decrease in the optical band gap values between 3.41 eV and 3.19 eV. PL studies confirmed the presence of defects in the ZnO films.

KW - BaZnO

KW - Optical properties

KW - SEM

KW - SILAR technique

KW - Thin films

KW - XRD

UR - https://www.scopus.com/pages/publications/85066076103

U2 - 10.1016/j.spmi.2019.05.010

DO - 10.1016/j.spmi.2019.05.010

M3 - Article

AN - SCOPUS:85066076103

SN - 0749-6036

VL - 130

SP - 321

EP - 331

JO - Superlattices and Microstructures

JF - Superlattices and Microstructures

ER -

Room-temperature synthesis and optical properties of nanostructured Ba-Doped ZnO thin films

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Keywords

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