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Article – Journal of Advanced Physical Sciences

Journal of Advanced Physical Sciences, Volume 1,Issue 1,2017 Pages 1-3

Carbothermal Synthesis and Photoluminescence Characteristics of Pure Undoped ZnTiO3 Nanocrystals
R.S. Raveendra, P.A. Prashanth*, R. Hari Krishna, N.P. Bhagya, S. Sathyanarayani, B.M. Nagabhushana

This work is licensed under a Creative Commons Attribution 4.0 International License

ZnTiO3 nanocrystals were synthesized by carbothermal synthesis using Zn(NO3)2 and CO(NH2)2 as starting materials. Powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDAX), high resolution transmission electron microscopy (HR-TEM) and UV-Vis absorption spectroscopy were used to characterize ZnTiO3 nanocrystals. PXRD results shows that as-formed powder was amorphous and the hexagonal phase ZnTiO3 nanocrystals forms after annealing the samples at temperature 800 °C for 2 hours. The optical band gap calculated from the absorption spectra using Tauc relation shows that the ZnTiO3 has band gap of ~3.6 eV. Upon 345 nm excitation, the photoluminescence emission spectra shows number of emission peaks ranging from blue to green. The observed peaks are centered at 412, 450, 461, 471, 492, and 542 nm. These are attributed to the different kinds of vacancies such as oxygen defects and cation vacancies.

Keywords: Carbothermal; Photoluminescence; Optoelectronics; Optical Band Gap;

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