Improvement of Electrical Conductivity in Conjugated Polymers through Cascade Doping with Small-Molecular Dopants

Title
Improvement of Electrical Conductivity in Conjugated Polymers through Cascade Doping with Small-Molecular Dopants
Authors
권지언윤상은박재홍이상연한지민고채영최식우김기철서형택김종현김봉기
Keywords
Conducting Polymer; Conjugated Polymer; Doping; Conductivity
Issue Date
2020-12
Publisher
Advanced materials
Citation
VOL 32, NO 49, 2005129
Abstract
Doping capability is primitively governed by the energy level offset between the highest occupied molecular orbital (HOMO) of conjugated polymers (CPs) and the lowest unoccupied molecular orbital (LUMO) of dopants. A poor doping efficiency is obtained when doping directly using NOBF4 forming a large energy offset with the CP, while the devised doping strategy is found to significantly improve the doping efficiency (electrical conductivity) by sequentially treating the NOBF4 to the pre-doped CP with 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquino-dimethane (F4TCNQ), establishing a relatively small energy level offset. It is verified that the cascade doping strategy requires receptive sites for each dopant to further improve the doping efficiency, and provides fast reaction kinetics energetically. An outstanding electrical conductivity (>610 S cm?1) is achieved through the optimization of the devised doping strategy, and spectroscopy analysis, including Hall effect measurement, supports more efficient charge carrier generation via the devised cascade doping.
URI
http://pubs.kist.re.kr/handle/201004/72596
ISSN
0935-9648
Appears in Collections:
KIST Publication > Article
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