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LUMINESCENCE INVESTIGATION OF POWDER ZNO NANOPARTICLES DOPED WITH SM AND LI IONS PREPARED BY COPRECIPITATION METHOD

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Last updated: 03 Jan 2025

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Astronomy
Mathematics
Physics

Abstract

The present study focuses on the structural and optical properties of ZnO doped with Sm and Li at very dilute concentrations, with compounds Zn1-x-ySmxLiyO (x = 0, 0.03 and y =0, 0.01, 0.03, 0.05). These compounds have been synthesized by a chemical coprecipitation method and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and Raman microscopy. The XRD pattern of all the samples showed ZnO hexagonal wurtzite structure, sharp and intense peaks with small change in lattice parameters due to doping in ZnO, indicating the substitution of Sm and Li ions for Zn sites. For Raman spectra, the strongest peak centered at about 435-437 cm-1 can be observed in all the samples, and the intensity of this peak decreases with Sm doping and increases with Li doping. The optical properties of the samples were systematically studied by ultraviolet-visible spectroscopy (UV-V) and photoluminescence (PL) spectroscopy. The maximum absorption of ZnO and Zn0.97Sm0.03O samples appears around 370 and 374 nm respectively near the absorption edge. Doping with Li affects the absorption edge and make it shift toward ultra violet and that the absorption increase with increasing Li content. The PL spectra show a broad and strong visible emission at 564 nm emission covering a large part of the visible region indicating the presence of intrinsic defects like vacancies.

DOI

10.21608/absb.2017.8175

Keywords

Luminescence, ZnO nanoparticles, SM AND LI IONS

Authors

First Name

H.

Last Name

Hantour

MiddleName

-

Affiliation

Faculty of Science, Physics Department, Al-Azhar University (Girls), Cairo, Egypt

Email

-

City

-

Orcid

-

First Name

N.

Last Name

Mohsen

MiddleName

A.

Affiliation

Faculty of Science, Physics Department, Al-Azhar University (Girls), Cairo, Egypt

Email

-

City

-

Orcid

-

First Name

S.

Last Name

El-Sayed

MiddleName

N.

Affiliation

Faculty of Science, Physics Department, Al-Azhar University (Girls), Cairo, Egypt

Email

-

City

-

Orcid

-

First Name

A.

Last Name

Mahmoud

MiddleName

M.

Affiliation

Faculty of Science, Physics Department, Al-Azhar University (Girls), Cairo, Egypt

Email

-

City

-

Orcid

-

Volume

28

Article Issue

Issue 2-D

Related Issue

1594

Issue Date

2017-06-01

Receive Date

2017-02-11

Publish Date

2017-06-01

Page Start

27

Page End

33

Print ISSN

1110-2535

Online ISSN

2636-3305

Article File

ABSB_Volume 28_Issue Issue 2-D_Pages 27-33.pdf

PDF . 1.7MB

Link

https://absb.journals.ekb.eg/article_8175.html

Detail API

https://absb.journals.ekb.eg/service?article_code=8175

Order

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Type

Original Article

Type Code

520

Publication Type

Journal

Publication Title

Al-Azhar Bulletin of Science

Publication Link

https://absb.journals.ekb.eg/

MainTitle

LUMINESCENCE INVESTIGATION OF POWDER ZNO NANOPARTICLES DOPED WITH SM AND LI IONS PREPARED BY COPRECIPITATION METHOD

Details

Type

Article

Created At

22 Jan 2023