31 6

Composition change-driven texturing and doping in solution-processed SnSe thermoelectric thin films

Title
Composition change-driven texturing and doping in solution-processed SnSe thermoelectric thin films
Author
장재영
Keywords
POLYCRYSTALLINE SNSE; THERMAL-CONDUCTIVITY; ELECTRONIC-STRUCTURE; TIN SELENIDE; POWER-FACTOR; PERFORMANCE; NANOCRYSTALS; DISSOLUTION; TRANSPORT; SPECTRA
Issue Date
2019-02
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE COMMUNICATIONS, v. 10, NO 864, Page. 1-10
Abstract
The discovery of SnSe single crystals with record high thermoelectric efficiency along the b-axis has led to the search for ways to synthesize polycrystalline SnSe with similar efficiencies. However, due to weak texturing and difficulties in doping, such high thermoelectric efficiencies have not been realized in polycrystals or thin films. Here, we show that highly textured and hole doped SnSe thin films with thermoelectric power factors at the single crystal level can be prepared by solution process. Purification step in the synthetic process produced a SnSe-based chalcogenidometallate precursor, which decomposes to form the SnSe2 phase. We show that the strong textures of the thin films in the b-c plane originate from the transition of two dimensional SnSe2 to SnSe. This composition change-driven transition offers wide control over composition and doping of the thin films. Our optimum SnSe thin films exhibit a thermoelectric power factor of 4.27 mu W cm(-1) K-2.
URI
https://www.nature.com/articles/s41467-019-08883-xhttp://repository.hanyang.ac.kr/handle/20.500.11754/107482
ISSN
2041-1723
DOI
10.1038/s41467-019-08883-x
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
Files in This Item:
Composition change-driven texturing and doping in solution-processed SnSe thermoelectric thin films.pdfDownload
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE