Achieving high power factor and output power density in p-type half-Heuslers Nb 1-x Ti x FeSb
Abstract
Thermoelectric technology can boost energy consumption efficiency by converting some of the waste heat into useful electricity. Heat-to-power conversion efficiency optimization is mainly achieved by decreasing the thermal conductivity in many materials. In comparison, there has been much less success in increasing the power factor. We report successful power factor enhancement by improving the carrier mobility. Our successful approach could suggest methods to improve the power factor in other materials. Using our approach, the highest power factor reaches ∼106 μW⋅cm −1 ⋅K −2 at room temperature. Such a high power factor further yields a record output power density in a single-leg device tested between 293 K and 868 K, thus demonstrating the importance of high power factor for power generation applications.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 15, 2016
- Source ID
- 10.1073/pnas.1617663113
Entities
People
- Ching-Wu Chu
- Chunhua Li
- Daniel Kraemer
- David Broido
- Gang Chen
- Hee Seok Kim
- Jing Shuai
- Jun Mao
- Lingping Zeng
- Qing Jie
- Ran He
- Yuan Liu
- Yucheng Lan
- Zhifeng Ren
Organizations
- Air Force Office of Scientific Research
- Boston College
- Lawrence Berkeley National Laboratory
- Massachusetts Institute of Technology
- Morgan State University
- United States Department of Energy
- University of Houston