About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
High Thermoelectric Performance in High-Quality Kesterite Single Crystals |
| Author(s) |
Akira Nagaoka, Shoma Miura, Hiroki Ienaga, Mao Mori, Keita Nomoto, Naoki Sato, Kenji Yoshino, Kensuke Nishioka |
| On-Site Speaker (Planned) |
Akira Nagaoka |
| Abstract Scope |
Thermoelectric (TE) power generation has emerged as a promising technology that could contribute to the sustainable energy supplies by direct conversion of thermal energy, such as industrial waste heat and automobile exhaust gas, into electricity. This study aims to demonstrate the effective p-type TE single-legs based on kesterite Cu2ZnSn(S1−xSex)4 (CZTSSe) single crystals with high dimensionless figure of merit ZT value. A record-high ZT of ~1.9 at 800 K was achieved using p-type alkali element-doped CZTSSe single crystals. The CZTSSe/Mo(SSe)2-barrier-layer/Mo-contact single-leg TE device exhibited decent ohmic properties and chemical stability between TE material and Cu electrode, enabling high energy-conversion efficiency and long-term stability. A maximum conversion efficiency of 10.4% at a temperature difference of 473 K was achieved, demonstrating the remarkable potential of CZTSSe for low-cost TE power generation. |