Thermoelectric properties of monolayer indium selenide (InSe) are investigated by using Boltzmann transport theory and first-principles calculations as a function of Fermi energy and crystal orientation. We find that the maximum power factor of p-type (n-type) monolayer InSe can be as large as 0.049 (0.043) W/K2m at 300 K in the armchair direction. The excellent thermoelectric performance of monolayer InSe is attributed to both its Seebeck coefficient and electrical conductivity. The large Seebeck coefficient originates from the moderate (about 2 eV) bandgap of monolayer InSe as an indirect gap semiconductor, while its large electrical conductivity is due to its unique two-dimensional density of states (DOS), which consists of an almost constant DOS near the conduction band bottom and a sharp peak near the valence band top.
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28 August 2017
Research Article|
September 01 2017
Two-dimensional InSe as a potential thermoelectric material Available to Purchase
Nguyen T. Hung
;
Nguyen T. Hung
a)
Department of Physics, Tohoku University
, Sendai 980-8578, Japan
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Ahmad R. T. Nugraha
;
Ahmad R. T. Nugraha
b)
Department of Physics, Tohoku University
, Sendai 980-8578, Japan
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Riichiro Saito
Riichiro Saito
Department of Physics, Tohoku University
, Sendai 980-8578, Japan
Search for other works by this author on:
Nguyen T. Hung
a)
Ahmad R. T. Nugraha
b)
Riichiro Saito
Department of Physics, Tohoku University
, Sendai 980-8578, Japan
a)
Electronic mail: [email protected]
b)
Electronic mail: [email protected]
Appl. Phys. Lett. 111, 092107 (2017)
Article history
Received:
May 20 2017
Accepted:
August 22 2017
Citation
Nguyen T. Hung, Ahmad R. T. Nugraha, Riichiro Saito; Two-dimensional InSe as a potential thermoelectric material. Appl. Phys. Lett. 28 August 2017; 111 (9): 092107. https://doi.org/10.1063/1.5001184
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