n-Type SnSe2 Oriented-Nanoplate-Based Pellets for High Thermoelectric Performance

It is reported that electron doped n-type SnSe2 nanoplates show promising thermoelectric performance at medium temperatures. After simultaneous introduction of Se deficiency and Cl doping, the Fermi level of SnSe2 shifts toward the conduction band, resulting in two orders of magnitude increase in ca...

Full description

Saved in:
Bibliographic Details
Published in:Advanced energy materials 2017-12, Vol.8 (8)
Main Authors: Luo, Yubo, Zheng, Yun, Luo, Zhongzhen, Hao, Shiqiang, Du, Chengfeng, Liang, Qinghua, Li, Zhong, Khor, Khiam Aik, Hippalgaonkar, Kedar, Xu, Jianwei, Yan, Qingyu, Wolverton, Chris, Kanatzidis, Mercouri G.
Format: Article
Language:English
Subjects:
chlorine doping
MATERIALS SCIENCE
nanoplate orientation
Se deficiency
SnSe2
thermoelectric
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:It is reported that electron doped n-type SnSe2 nanoplates show promising thermoelectric performance at medium temperatures. After simultaneous introduction of Se deficiency and Cl doping, the Fermi level of SnSe2 shifts toward the conduction band, resulting in two orders of magnitude increase in carrier concentration and a transition to degenerate transport behavior. In addition, all-scale hierarchical phonon scattering centers, such as point defects, nanograin boundaries, stacking faults, and the layered nostructures, cooperate to produce very low lattice thermal conductivity. Lastly, an enhanced in-plane thermoelectric figure of merit ZTmax of 0.63 is achieved for a 1.5 at% Cl doped SnSe1.95 pellet at 673 K, which is much higher than the corresponding in-plane ZT of pure SnSe2 (0.08).
ISSN:1614-6832
1614-6840