콘텐츠 본문
논문 해외 국제전문학술지(SCI급) THERMOELECTRIC MATERIALS BY USING TWO-DIMENSIONAL MATERIALS WITH NEGATIVE CORRELATION BETWEEN ELECTRICAL AND THERMAL CONDUCTIVITY
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2016-06
- 저자명 홍기하공동(참여)
- 학술지명 NATURE COMMUNICATIONS
- 발행처명 NATURE PUBLISHING GROUP
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 11
논문 초록 (Abstract)
In general, in thermoelectric materials the electrical conductivity σ and thermal conductivity κ are related and thus cannot be controlled independently. Previously, to maximize the thermoelectric figure of merit in state-of-the-art materials, differences in relative scaling between σ and κ as dimensions are reduced to approach the nanoscale were utilized. Here we present an approach to thermoelectric materials using tin disulfide, SnS2, nanosheets that demonstrated a negative correlation between σ and κ. In other words, as the thickness of SnS2 decreased, σ increased whereas κ decreased. This approach leads to a thermoelectric figure of merit increase to 0.13 at 300 K, a factor ∼1,000 times greater than previously reported bulk single-crystal SnS2. The Seebeck coefficient obtained for our two-dimensional SnS2 nanosheets was 34.7 mV K−1 for 16-nm-thick samples at 300 K.
