Electrical characteristics of heterogeneous polymer layers in PEDOT:PSS films

被引:36
作者
Kim, Yunryeol [1 ]
Cho, Wonseok [1 ]
Kim, Youngno [1 ]
Cho, Hangyeol [1 ]
Kim, Jung Hyun [1 ]
机构
[1] Yonsei Univ, Dept Chem & Biomol Engn, 134 Shinchon Dong, Seoul 120749, South Korea
基金
新加坡国家研究基金会;
关键词
ORGANIC SOLAR-CELLS; WORK-FUNCTION; THERMOELECTRIC PROPERTIES; NEXT-GENERATION; PEDOT/PSS FILMS; HYBRID FILMS; TRANSPARENT; CONDUCTIVITY; EFFICIENT; ELECTRODE;
D O I
10.1039/c8tc02598c
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
(3,4-Ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT: PSS), a representative conducting polymer, is environment-friendly and offers easy processing and flexibility owing to its hydro-dispersive properties. In this study, we investigated the electrical properties of PEDOT: PSS films with H2SO4/DMSO post-treatment. PEDOT: PSS is an electrolyte complex that has been attracting attention as a nextgeneration transparent electrode. The PEDOT: PSS films are composed of two heterogeneous phases: a PSS-rich layer and a PEDOT-rich layer. The PSS-rich layer is observed to be a homogeneous phase that does not influence the electrical properties. Thus, the PSS-rich layer, which occupies a large area of the PEDOT: PSS films, was removed to obtain films having high electrical properties. Both the layers exhibit a homogeneous phase regardless of their electrical properties. In particular, the PSS-rich layer without the PEDOT chains does not affect the electrical properties, since it does not contribute to hole transport. The heterogeneity of the PEDOT: PSS films with good electrical properties has been revealed by eliminating the unnecessary PSS-rich layers. The highest electrical conductivity obtained was 2239 S cm(-1), which is about 4.1 times higher than that of the pristine PEDOT: PSS films, for the films involving 15 M H2SO4/DMSO post-treatment.
引用
收藏
页码:8906 / 8913
页数:8
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