| 학회 | 한국화학공학회 |
| 학술대회 | 2021년 가을 (10/27 ~ 10/29, 광주 김대중컨벤션센터) |
| 권호 | 27권 2호, p.1988 |
| 발표분야 | 이동현상 |
| 제목 | Phonon engineering of chalcopyrite compound by unusual phase stabilization |
| 초록 | In the past century, the interdependence between electrical and thermal transport properties in inorganic solid compound has been studied in full swing. Thermoelectric (TE) technology has come out from high electrical energy transport with simultaneously softened phonon movement. CuFeS2 has been highlighted for economical and toxic-free TE materials with decent electrical transport properties. Nevertheless, because of the diamond-like structure, the thermal energy is easily conducted inside the CuFeS2 chalcopyrite and the energy conversion efficiency has not been improved. Here we present a phonon engineering strategy for reducing lattice thermal conductivity of CuFeS2-based materials by stabilizing high temperature phase. With locally stabilization of the high temperature phase, an atomic disorder between Cu and Fe site enhanced. It can weaken the heat transfer inside the chalcopyrite matrix, which results in ~60% decrease in lattice thermal conductivity of high temperature phase stabilized CuFeS2 compared to that of pristine one. |
| 저자 | 이형석, 정인 |
| 소속 | Center for Correlated Electron Systems (IBS) / 서울대 |
| 키워드 | 이동현상 |
| 원문파일 | 초록 보기 |
