Preparation and Characterization of Electrodeposited Bi2Te3ySey Thermoelectric Films
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 coefficient 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.
Electrodeposition Bi2Te3ySey Film Chronopotentiometry Nucleation
Zhigang Zou Song Chen Kefeng Cai
Functional Materials Research Laboratory, Tongji University, Shanghai 200092, China Functional Materials Research Laboratory, Tongji University, Shanghai 200092, China;State Key Lab of
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
76-82
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）