Influence of Imidazole-Based Acidity Control of PEDOT:PSS on Its Electrical Properties and Environmental Stability

被引:42
|
作者
Cho, Ahra [1 ]
Kim, Seyul [1 ]
Kim, Soyeon [1 ]
Cho, Wonseok [1 ]
Park, Chanil [1 ]
Kim, Felix Sunjoo [2 ]
Kim, Jung Hyun [1 ]
机构
[1] Yonsei Univ, Dept Chem & Biomol Engn, 50 Yonsei Ro, Seoul 120749, South Korea
[2] Chung Ang Univ, Sch Chem Engn & Mat Sci, 84 Heukseok Ro, Seoul 156756, South Korea
基金
新加坡国家研究基金会;
关键词
antioxidants; conducting polymers; imidazole; neutralization; PEDOT:PSS; thin films; transparent conductor; LIGHT-EMITTING-DIODES; HOLE-INJECTION LAYER; THERMOELECTRIC PROPERTIES; THERMAL-TREATMENT; SOLAR-CELLS; THIN-FILMS; PSS; TRANSPARENT; CONDUCTIVITY; POLY(3,4-ETHYLENEDIOXYTHIOPHENE);
D O I
10.1002/polb.24048
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) has been studied for a wide range of applications due to its potential as a transparent electrode. Herein, the use of imidazole and its derivatives as a neutralizing additive for PEDOT: PSS dispersion and in-depth studies of their effects in terms of electrical properties and stability is reported. Although the neutralization in general reduces the electrical conductivity of PEDOT: PSS, the conductivity after imidazole treatment (685.2 S cm(-1)) is higher than that after treatment of other derivatives. Spectroscopic and thermoelectric studies show that the de-doping effect resulted in the conductivity reduction. As a trade-off of the conductivity reduction, greatly enhanced long-term stability and noncorrosive characteristics are obtained after neutralization. The change in sheet resistance of imidazole-treated PEDOT: PSS after 500 h under harsh conditions (85 degrees C and 85% humidity) is half that of the untreated samples, demonstrating the great enhancement of the stability. (C) 2016 Wiley Periodicals, Inc.
引用
收藏
页码:1530 / 1536
页数:7
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