Preparation and Characterization of Electrodeposited Bi2Te3-YSey Thermoelectric Films
Year: 2013
Type: article
Abstract: The nucleation and growth model of Bi2Te3-ySey film on indium tin oxide-coated glass substrates from an aqueous acidic electrolyte at room temperature were studied using cyclic voltammetry, chronopotentiometry and field emission scanning electron microscope. The electrodeposition process was irreversible and controlled by diffusion, with a limiting current density of 1.78 mA/cm2. When the deposition current density was lower than the value or above the value but with agitation, the formation and growth of the film were controlled by instantaneous nucleation and gradually growth process, and homogeneous film was formed. While when the current density was larger than the value without agitation, flocculent film was obtained. Bi2Te3-ySey film deposited at 4 mA/cm2 with agitation showed smoother morphology compared with the film deposited at 1 mA/cm2. The electrical conductivity and Seebeck coefcient of the two Bi2Te3-ySey films were measured after being transferred onto a non-conductive rubberized fabric support. Both the films showed n-type conduction, and the former showed higher electrical conductivity and power factor.
Source: Materials science forum
Authors: Zhi Gang Zou, Song Chen, Ke Feng Cai
Institution: Tongji University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W2243805734