TY - JOUR
T1 - High Thermoelectric Performance in Electron-Doped AgBi3S5 with Ultralow Thermal Conductivity
AU - Tan, Gangjian
AU - Hao, Shiqiang
AU - Zhao, Jing
AU - Wolverton, Chris
AU - Kanatzidis, Mercouri G.
N1 - Funding Information:
This work is supported by a grant by the U.S. Department of Energy, Office of Science, and Office of Basic Energy Sciences under Award Number DE- SC0014520.
Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/5/10
Y1 - 2017/5/10
N2 - We report electron-doped AgBi3S5 as a new high-performance nontoxic thermoelectric material. This compound features exceptionally low lattice thermal conductivities of 0.5-0.3 W m-1 K-1 in the temperature range of 300-800 K, which is ascribed to its unusual vibrational properties: "double rattling" phonon modes associated with Ag and Bi atoms. Chlorine doping at anion sites acts as an efficient electron donor, significantly enhancing the electrical properties of AgBi3S5. In the carrier concentration range (5 × 1018-2 × 1019 cm-3) investigated in this study, the trends in Seebeck coefficient can be reasonably understood using a single parabolic band model with the electron effective mass of 0.22 me (me is the free electron mass). Samples of 0.33% Cl-doped AgBi3S5 prepared by spark plasma sintering show a thermoelectric figure of merit of ∼1.0 at 800 K.
AB - We report electron-doped AgBi3S5 as a new high-performance nontoxic thermoelectric material. This compound features exceptionally low lattice thermal conductivities of 0.5-0.3 W m-1 K-1 in the temperature range of 300-800 K, which is ascribed to its unusual vibrational properties: "double rattling" phonon modes associated with Ag and Bi atoms. Chlorine doping at anion sites acts as an efficient electron donor, significantly enhancing the electrical properties of AgBi3S5. In the carrier concentration range (5 × 1018-2 × 1019 cm-3) investigated in this study, the trends in Seebeck coefficient can be reasonably understood using a single parabolic band model with the electron effective mass of 0.22 me (me is the free electron mass). Samples of 0.33% Cl-doped AgBi3S5 prepared by spark plasma sintering show a thermoelectric figure of merit of ∼1.0 at 800 K.
UR - http://www.scopus.com/inward/record.url?scp=85018904367&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85018904367&partnerID=8YFLogxK
U2 - 10.1021/jacs.7b02399
DO - 10.1021/jacs.7b02399
M3 - Article
C2 - 28418258
AN - SCOPUS:85018904367
SN - 0002-7863
VL - 139
SP - 6467
EP - 6473
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 18
ER -