Journal article
Phase-Defined van der Waals Schottky Junctions with Significantly Enhanced Thermoelectric Properties
The journal of physical chemistry letters, Vol.8(13), pp.2887-2894
07/06/2017
Handle:
https://hdl.handle.net/2376/113922
PMID: 28593766
Abstract
We demonstrate a van der Waals Schottky junction defined by crystalline phases of multilayer In2Se3. Besides ideal diode behaviors and the gate-tunable current rectification, the thermoelectric power is significantly enhanced in these junctions by more than three orders of magnitude compared with single-phase multilayer In2Se3, with the thermoelectric figure-of-merit approaching ∼1 at room temperature. Our results suggest that these significantly improved thermoelectric properties are not due to the 2D quantum confinement effects but instead are a consequence of the Schottky barrier at the junction interface, which leads to hot carrier transport and shifts the balance between thermally and field-driven currents. This “bulk” effect extends the advantages of van der Waals materials beyond the few-layer limit. Adopting such an approach of using energy barriers between van der Waals materials, where the interface states are minimal, is expected to enhance the thermoelectric performance in other 2D materials as well.
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Details
- Title
- Phase-Defined van der Waals Schottky Junctions with Significantly Enhanced Thermoelectric Properties
- Creators
- Qiaoming Wang - Washington State UniversityLiangliang Yang - Washington State UniversityShengwen Zhou - Washington State UniversityXianjun Ye - Washington State UniversityZhe Wang - University of Science and Technology of ChinaWenguang Zhu - University of Science and Technology of ChinaMatthew D McCluskey - Washington State UniversityYi Gu - Washington State University
- Publication Details
- The journal of physical chemistry letters, Vol.8(13), pp.2887-2894
- Academic Unit
- Physics and Astronomy, Department of
- Publisher
- American Chemical Society
- Identifiers
- 99900547402601842
- Language
- English
- Resource Type
- Journal article