Work

Investigation of Electrical and Thermoelectric Properties of ZnO/rGO Composites Prepared by Conventional Solid-state Reaction Method

Year: 2021

Type: article

Abstract: ZnO/rGO composites are prepared by the conventional solid-state reaction method. Structural properties of prepared compounds were studied using XRD technique and it is observed that all the samples are crystallized in wurtzite structure. Electrical resistivity measurements were carried out using four probe method employing a closed cycle refrigerator. With addition of rGO, colossal reduction in the resistivity is observed which is about three orders of magnitude smaller than that of the pure sample of ZnO. Room temperature Hall measurements were performed to estimate the bulk concentration and results show that addition of rGO into ZnO matrix enhances the number of charge carriers. Thermopower measurements were carried out using differential dc method and a large reduction in Seebeck coefficient is observed.

Source: Journal of Nano- and Electronic Physics

DOI: 10.21272/jnep.13(1).01026

Authors: Suraj Mangavati, Ashok Rao, Dheeraj Devadiga, M. Selvakumar, Monika Saxena, G. S. Okram

Institutions: Manipal Academy of Higher Education, UGC DAE Consortium for Scientific Research

Language: English

Topic: ZnO doping and properties

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: diamond

Funders: Department of Science and Technology, Ministry of Science and Technology, India, Board of Research in Nuclear Sciences

Awards: G31983556, G5164508906