Synthesis of Copper Telluride Thin Films by Electrodeposition and Their Electrical and Thermoelectric Properties

Frontiers in Chemistry

Chemistry

Jungjoon Park¹  Jinmyeong Seo¹  Bongyoung Yoo¹  Jae-Hong Lim² 

[1] Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, South Korea;Department of Materials Science and Engineering, Gachon University, Seongnam, South Korea;

关键词: copper telluride;    electrodeposition;    thermoelectric;    compositional control;    carrier filtering effect;   

DOI  :  10.3389/fchem.2022.799305

 received in 2021-10-21, accepted in 2022-01-03,  发布年份 2022

来源: Frontiers

【 摘 要 】

Intermetallic copper telluride thin films, which are important in a number of electronics fields, were electrodeposited using a potentiostatic method in low-pH aqueous electrolyte baths with various ion-source concentrations, and the electrical properties of the formed films were investigated after exfoliation from the substrate. The films were electrochemically analyzed by cyclic voltammetry, while surface and cross-sectional morphologies, compositional ratios, and electrical properties were analyzed by scanning electron microscopy, X-ray diffractometry, X-ray photoelectron spectroscopy, ultraviolet photoelectron spectroscopy, and Hall-effect experiments. The copper telluride thin films, which were synthesized at various potentials in each bath, exhibit different composition ratios and structures; consequently, they show a variety of electrical and thermoelectric properties, including different electrical conductivities, carrier concentrations, mobilities, and Seebeck coefficients. Among them, the thin film with a 1:1 Cu:Te ratio delivered the highest power factor due to carrier filtering at the interface between the two phases.

【 授权许可】

Unknown   
Copyright © 2022 Park, Seo, Lim and Yoo.