Microstructure and Optical Bandgap of Cobalt Selenide Nanofilms
- Авторы: Ghobadi N.1, Habibi M.2, Rezaee S.3, Ţălu Ş.4, Shakoury R.5, Arman A.6, Luna C.7, Amiri F.1, Naderi S.8, Hafezi F.6, Mardani M.6
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Учреждения:
- Department of Physics, Faculty of Science, Malayer University
- Department of Physics, Iran University of Science and Technology, Narmak
- Department of Physics, Kermanshah Branch, Islamic Azad University
- Technical University of Cluj-Napoca, the Directorate of Research, Development and Innovation Management (DMCDI)
- Department of Physics, Faculty of Science, Imam Khomeini International University
- Vacuum Technology Research Group, ACECR, Sharif University Branch
- Universidad Autónoma de Nuevo León, Facultad de Ciencias Físico Matemáticas, Av. Universidad S/N
- Young Researchers and Elite Club, Kermanshah Branch, Islamic Azad University
- Выпуск: Том 53, № 13 (2019)
- Страницы: 1751-1758
- Раздел: Semiconductor Structures, Low-Dimensional Systems, and Quantum Phenomena
- URL: https://journals.rcsi.science/1063-7826/article/view/207447
- DOI: https://doi.org/10.1134/S1063782619130074
- ID: 207447
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Аннотация
The purpose of this research is to explore the properties of CoSe nanostructured thin films on glass substrates prepared by a chemical solution deposition method. Special attention is given to study the effects of precursor concentrations (Cobalt(II) acetate, Ammonia and Sodium Selenosulphite), fixing the Co:Se concentration ratio, on the grainy structure and optical properties of the resulting thin films. The structural, chemical composition and morphological characteristics were investigated by X-ray diffraction (XRD), energy dispersive X-ray microanalysis (EDX) and scanning electron microscopy (SEM), respectively. The optical properties were determined by UV–visible spectroscopy determining the optical band gap energy (Eg). According to these results, the average particle diameter was decreased from 119 to 42 nm as the precursor salt concentration was decreased from 0.3 to 0.1 M, being the bigger nanoparticles more spherical. With the reduction of the particle size, a blue shift in the absorption peaks of the UV–visible spectra and an increment of their optical band gap energy (from 1.8 to 3.6 eV) occurred due to confinement effects.
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Об авторах
Nader Ghobadi
Department of Physics, Faculty of Science, Malayer University
Email: saharrezaee593@iauksh.ac.ir
Иран, Malayer
Maryam Habibi
Department of Physics, Iran University of Science and Technology, Narmak
Email: saharrezaee593@iauksh.ac.ir
Иран, Tehran, 16846-13114
Sahar Rezaee
Department of Physics, Kermanshah Branch, Islamic Azad University
Автор, ответственный за переписку.
Email: saharrezaee593@iauksh.ac.ir
Иран, Kermanshah
Ştefan Ţălu
Technical University of Cluj-Napoca, the Directorate of Research, Development and Innovation Management (DMCDI)
Email: saharrezaee593@iauksh.ac.ir
Румыния, Cluj County
Reza Shakoury
Department of Physics, Faculty of Science, Imam Khomeini International University
Email: saharrezaee593@iauksh.ac.ir
Иран, Qazvin
Ali Arman
Vacuum Technology Research Group, ACECR, Sharif University Branch
Email: saharrezaee593@iauksh.ac.ir
Иран, Tehran
Carlos Luna
Universidad Autónoma de Nuevo León, Facultad de Ciencias Físico Matemáticas, Av. Universidad S/N
Email: saharrezaee593@iauksh.ac.ir
Мексика, San Nicolás de los Garza, Nuevo Leon, 66455
Fatemeh Amiri
Department of Physics, Faculty of Science, Malayer University
Email: saharrezaee593@iauksh.ac.ir
Иран, Malayer
Sirvan Naderi
Young Researchers and Elite Club, Kermanshah Branch, Islamic Azad University
Email: saharrezaee593@iauksh.ac.ir
Иран, Kermanshah
Fatemeh Hafezi
Vacuum Technology Research Group, ACECR, Sharif University Branch
Email: saharrezaee593@iauksh.ac.ir
Иран, Tehran
Mohsen Mardani
Vacuum Technology Research Group, ACECR, Sharif University Branch
Email: saharrezaee593@iauksh.ac.ir
Иран, Tehran