High-quality SnSe2 single crystal: Electronic and thermoelectric properties

Title
High-quality SnSe2 single crystal: Electronic and thermoelectric properties
Authors
류혜진이지은Anh-Tuan PhamThi Hoa VuCheng ChangThi Ly TrinhChoongyu HwangSung-Kwan MoJungdae KimLi-dong ZhaoAnh-Tuan DuongSunglae Cho
Issue Date
2020-11
Publisher
ACS applied energy materials
Citation
VOL 3, NO 11-10792
Abstract
High-quality SnSe2 single crystals were successfully synthesized using a temperature gradient method. N-type characteristics and strong anisotropic transport properties of SnSe2 single crystals were exhibited between the ab plane and the c-axis. At 673 K, the power factor (PF) value along the ab plane is 3.43 μW cm-1 K-2, while it is 0.92 μW cm-1 K-2 along the c-axis. The ratio between thermal conductivities along the ab plane (κab) and c-axis (κc) is on the order of 7.6 at 300 K, while this value is about 5.6 at 673 K. The thermoelectric figure of merit (ZT) in the c-axis (0.15) is higher than that (0.1) along the ab plane, according to the ultralow out-of-plane thermal conductivity. The electronic band structure results, which were examined by angle-resolved photoemission spectroscopy (ARPES) predicted the potential of improving the thermoelectric performance of SnSe2 single crystals by electron doping.
URI
http://pubs.kist.re.kr/handle/201004/71926
ISSN
2574-0962
Appears in Collections:
KIST Publication > Article
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