TY - JOUR
T1 - n-Type SnSe2 Oriented-Nanoplate-Based Pellets for High Thermoelectric Performance
AU - Luo, Yubo
AU - Zheng, Yun
AU - Luo, Zhongzhen
AU - Hao, Shiqiang
AU - Du, Chengfeng
AU - Liang, Qinghua
AU - Li, Zhong
AU - Khor, Khiam Aik
AU - Hippalgaonkar, Kedar
AU - Xu, Jianwei
AU - Yan, Qingyu
AU - Wolverton, Chris
AU - Kanatzidis, Mercouri G.
N1 - Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/3/15
Y1 - 2018/3/15
N2 - 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).
AB - 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).
KW - Se deficiency
KW - SnSe
KW - chlorine doping
KW - nanoplate orientation
KW - thermoelectric
UR - http://www.scopus.com/inward/record.url?scp=85037665864&partnerID=8YFLogxK
U2 - 10.1002/aenm.201702167
DO - 10.1002/aenm.201702167
M3 - 文章
AN - SCOPUS:85037665864
SN - 1614-6832
VL - 8
JO - Advanced Energy Materials
JF - Advanced Energy Materials
IS - 8
M1 - 1702167
ER -