Optical and structural properties of Zn0.94Cu0.04Cr0.02O nanoparticles by two-step annealing

Authors

  • R. Sangeetha Department of Physics, Jainee College of Engineering and Technology, Dindigul,624303 Tamilnadu, India
  • S. Muthukumaran PG & Research Department of Physics, Government Arts College, Melur -625 016, Madurai, Tamilnadu, India

Keywords:

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Abstract

Zn0.94Cu0.04Cr0.02O nanocrystals were synthesized by co-precipitation method and the effects of annealing at
600 and 800°C under two steps on the structural, optical and morphological properties were investigated systematically.
X-ray diffraction pattern showed the secondary phases such as CuO and ZnCr2O4 were found at 600°+800°C annealed
sample. The variation of absorption peaks between 473 and 556 cm-1 and the shift of absorption frequency towards the
lower side by annealing revealed that Zn–O–Zn network is perturbed by the presence of Cu/Cr in its environment.
Absorption intensity and blue shift of energy gap were discussed based on size, defects and secondary phase formation.
The broad transmittance spectra noticed around visible region illustrated the presence of oxygen related defects and
Cu/Cr interstitials.

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Published

2022-08-23

Issue

Vol. 5 No. 19 (2018): ICMNRE-2018 (International Conference on Momentous Role of Nanomaterials in Renewable Energy Devices)

Section

Articles

How to Cite

Optical and structural properties of Zn0.94Cu0.04Cr0.02O nanoparticles by two-step annealing. (2022). International Journal of Advance Engineering and Research Development (IJAERD), 5(19), -. https://ijaerd.org/index.php/IJAERD/article/view/6442