Brønsted Acid Doping of P3HT with Largely Soluble Tris(pentafluorophenyl)borane for Highly Conductive and Stable Organic Thermoelectrics Via One-Step Solution Mixing
- Title
- Brønsted Acid Doping of P3HT with Largely Soluble Tris(pentafluorophenyl)borane for Highly Conductive and Stable Organic Thermoelectrics Via One-Step Solution Mixing
- Author
- 장재영
- Keywords
- Brønsted acids; molecular doping; organic thermoelectrics; tris(pentafluorophenyl)borane; type II polymorphs
- Issue Date
- 2020-12
- Publisher
- WILEY-V C H VERLAG GMBH
- Citation
- ADVANCED ENERGY MATERIALS, v. 10, no. 47, article no. 2002521, page. 1-12
- Abstract
- Molecular doping is essential for improving the thermoelectric properties of conjugated polymers, but dopants of low solubility either restrict the formation of high quality films or complicate fabrication steps. Although a highly soluble molecular dopant, tris(pentafluorophenyl)borane (BCF), has been sporadically studied, its potential has not yet been fully explored. Herein, particularly intriguing effects of Bronsted acid doping with BCF-water complexes for poly(3-hexylthiophene) (P3HT) are reported, which can facilitate substantial increases in electrical and thermoelectric properties with remarkable doping stabilities. Interestingly, a unique polymorph of P3HT with interdigitated alkyl chains (called type II) is observed in the Bronsted acid doping with BCF-water complexes. Moreover, the doped P3HT shows conformational change to the quinoid structure, enabling increased backbone planarity. As a result, the Bronsted acid-doped P3HT films exhibit outstanding electrical conductivities, thermoelectric power factors, and figure-of-merit of up to 33.0 S cm(-1), 28.3 mu W m(-1) K-2, and 0.034, respectively. These values are at least an order of magnitude higher than those of P3HT films doped with a conventional molecular dopant, 7,7,8,8-tetracyano-2,3,5,6-tetrafluoroquinodimethane. The Bronsted acid doping with BCF-water complexes also affords excellent air stabilities of P3HT films, which potentially provides a strong comparative advantage over existing highly reactive salt-type dopants, such as FeCl3.
- URI
- https://onlinelibrary.wiley.com/doi/10.1002/aenm.202002521https://repository.hanyang.ac.kr/handle/20.500.11754/172929
- ISSN
- 1614-6832; 1614-6840
- DOI
- 10.1002/aenm.202002521
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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