N‐type SnSe2 oriented‐nanoplate‐based pellets for high thermoelectric performance

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
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.
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2020
Subjects:
Engineering::Materials
Chlorine Doping
Nanoplate Orientation
Online Access:https://hdl.handle.net/10356/139265
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
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 nanostructures, cooperate to produce very low lattice thermal conductivity. As a result, 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).

Similar Items