Anisotropic electrical transports in rolled Ag2Se film
Abstract
Ag2Se is a promising room-temperature thermoelectric (TE) material that can be processed into free-standing films by using the hot-rolling method. In this work, we find the rolled Ag2Se film has anisotropic electrical transport. The carrier mobility, electrical conductivity, and power factor parallel to the rolling direction are much higher than those perpendicular to the rolling direction. Such anisotropic electrical transports originate from the grain elongation during the rolling process, which introduces more grain boundaries perpendicular to the rolling direction to scatter carriers. This work is meaningful for using the rolled Ag2Se film to fabricate the high-performance flexible TE devices.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (7)
Shuo Xu
Frontiers Science Center for New Organic Matter, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), State Key Laboratory of Advanced Chemical Power Sources, College of Chemistry
Shiqi Yang
State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics
Pengfei Qiu
State Key Laboratory of High Performance Ceramics, Shanghai Institute of Ceramics
Zhiqiang Gao
Ming Gu
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences 1 , Shanghai 200050,
Wenwen Zheng
Xun Shi
State Key Laboratory of High Performance Ceramics, Shanghai Institute of Ceramics