Optical and structural properties of Zn0.94Cu0.04Cr0.02O nanoparticles by two-step annealing
| Author(s) | : | R. Sangeetha, S. Muthukumaran |
| Institution | : | Department of Physics, Jainee College of Engineering and Technology, Dindigul,624303 Tamilnadu, India |
| Published In | : | Vol. 5, Issue 19 — January 2018 |
| Page No. | : | - |
| Domain | : | Engineering |
| Type | : | Research Paper |
| ISSN (Online) | : | 2348-4470 |
| ISSN (Print) | : | 2348-6406 |
Zn0.94Cu0.04Cr0.02O nanocrystals were synthesized by co-precipitation method and the effects of annealing at600 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 annealedsample. The variation of absorption peaks between 473 and 556 cm-1 and the shift of absorption frequency towards thelower 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 andCu/Cr interstitials.
R. Sangeetha, S. Muthukumaran, “Optical and structural properties of Zn0.94Cu0.04Cr0.02O nanoparticles by two-step annealing”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 5, Issue 19, pp. -, January 2018.
