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SHASHANK KINRA
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Volume 45 All articles Published: 7 April 2022 Article ID 0065
Correlating the microstructural and optical properties of vanadium ion-doped ZnO nanocrystals
SHASHANK KINRA MRITUNJOY PRASAD GHOSH SIPUN MOHANTY RAVI KANT CHOUBEY SAMRAT MUKHERJEE
This article deals with the synthesis, structural and optical characterizations of vanadium ion-doped ZnO nanoparticles. Four nanosized samples with a generic composition Zn$_{1–x}$V$_x$O (
x = 0.00, 0.02, 0.04 and 0.06) were prepared using standard co-precipitation method. X-ray diffraction studies confirmed the existence of hexagonal wurtzite crystal structure and phase purity of prepared samples. Mean crystallites size within the range of 25 ± 3 nm was obtained from Scherrer’s formula. The compressive microstrain in the pure ZnO sample as obtained from Williamson–Hall plot ensured the presence of vacancies inside the nanocrystals. The surface morphology of doped ZnO nanocrystals was studied using field-emission scanning electron microscope image. Undoped ZnO nanoparticles showed a strong optical absorption near 390 nm. A redshift in direct bandgaps with increasing vanadium ions in ZnO matrix was noticed. Vanadium ions were present in three different oxidation states (+2, +3 and +4) within the host ZnO structure as obtained from X-ray photoelectron spectra. Photoluminescence studies also detected the existence of both zinc and oxygen vacancies in the synthesized nanoparticles.
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Bulletin of Materials Science
Volume 46, 2023
All articles
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Posted on October 12, 2020Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
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