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arXiv · 1411.6468

Thermoelectric power of bulk black-phosphorus

Eduardo Flores·Jose R. Ares·Andres Castellanos-Gomez·Mariam Barawi·Isabel J. Ferrer·Carlos Sánchez
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Abstract

The potential of bulk black-phosphorus for thermoelectric applications has been experimentally studied. The Seebeck Coefficient (S) has been measured in the temperature range from 300 K to 385 K, finding a value of S = +335 +- 10 uV/K at room temperature (indicating a naturally occurring p-type conductivity). S increases with temperature, as expected for p-type semiconductors, which can be attributed to an increase of the charge carrier density. The electrical resistance drops up to a 40 % while heating in the studied temperature range. As a consequence, the power factor at 385 K is 2.7 times higher than that at room temperature. This work demonstrates the feasibility of black-phosphorus in thermoelectric applications, such as thermal energy scavenging, which typically require devices with high performance at temperatures above room temperature.

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Eduardo Flores, Jose R. Ares, Andres Castellanos-Gomez, Mariam Barawi, Isabel J. Ferrer, Carlos Sánchez. 2015-01-26. Thermoelectric power of bulk black-phosphorus. https://doi.org/10.1063/1.4905636

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