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Investigations on structural and optical properties of co-doped (Ag, Co) ZnO nanoparticles

B. SANKARA REDDY1, S. VENKATRAMANA REDDY1,* , P. VENKATESWARA REDDY1, N. KOTEESWARA REDDY2

Affiliation

  1. Department of Physics, Sri Venkateswara University, Tirupati 517502, A.P, India
  2. Center for Nanoscience and Engineering (CeNSE), Indian Institute of Science, Bangalore-560 012, India

Abstract

Undoped and co-doped (Ag, Co) ZnO powders were synthesized by chemical co-precipitation method without using any capping agent. The X-ray diffraction results indicate that the undoped and co-doped ZnO powders have pure hexagonal structure and are consisting of nanosized single-crystalline particles. The size of the nanoparticles increases with increasing Ag concentration from 1 to 5 mol% as compared to that of undoped ZnO. The presence of substitution dopants of Ag and Co in the ZnO host material was confirmed by the Energy dispersive analysis of X-rays (EDAX). Optical absorption measurements indicate blue shift and red-shift in the absorption band edge upon doping concentration of Ag and blue emission was observed by photoluminescence (PL) studies..

Keywords

ZnO nanoparticles, Co-precipitation method, Structural properties, Optical properties, EDS (EDAX).

Citation

B. SANKARA REDDY, S. VENKATRAMANA REDDY, P. VENKATESWARA REDDY, N. KOTEESWARA REDDY, Investigations on structural and optical properties of co-doped (Ag, Co) ZnO nanoparticles, Optoelectronics and Advanced Materials - Rapid Communications, 6, 11-12, November-December 2012, pp.953-959 (2012).

Submitted at: July 23, 2012

Accepted at: Oct. 30, 2012