Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 21, Pages 17957-17962Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b03982
Keywords
black phosphorus; exfoliation; organic thermoelectric; PEDOT:PSS; doping
Funding
- Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2017M3D1A1039558]
- Low-dimensional Materials Genome Development - Korea Research Institute of Standards and Science [KRISS-2017-17011082]
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In recent years, two-dimensional black phosphorus (BP) has seen a surge of research because of its unique optical, electronic, and chemical properties. BP has also received interest as a potential thermoelectric material because of its high Seebeck coefficient and excellent charge mobility, but further development is limited by the high cost and poor scalability of traditional BP synthesis techniques. In this work, high-quality BP is synthesized using a low-cost method and utilized in a PEDOT:PSS film to create the first ever BP composite thermoelectric material. The thermoelectric properties are found to be greatly enhanced after the BP addition, with the power factor of the film, with 2 wt % BP (36.2 mu W m(-1) K-2) representing a 109% improvement over the pure PEDOT:PSS film (17.3 mu W m(-1) K-2). A simultaneous increase of mobility and decrease of the carrier concentration is found to occur with the increasing BP wt %, which allows for both Seebeck coefficient and electrical conductivity to be increased. These results show the potential of this low-cost BP for use in energy devices.
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