Segmentation of conducting domains in PEDOT:PSS films induced by an additive for conductivity enhancement

被引：9
作者：
Unuma, Takeya [1 ,2 ]
Yoshikawa, Muneki [1 ]
Nakamura, Arao [1 ]
Kishida, Hideo [1 ]
机构：
[1] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan
[2] Nagaoka Univ Technol, Dept Elect Elect & Informat Engn, Nagaoka, Niigata 9402188, Japan
来源：
APPLIED PHYSICS EXPRESS | 2016年 / 9卷 / 05期
关键词：
LIGHT-EMITTING-DIODES; PSS THIN-FILMS; POLY 3,4-ETHYLENEDIOXYTHIOPHENE; PHOTOELECTRON-SPECTROSCOPY; MORPHOLOGY; SOLVENT; POLY(3,4-ETHYLENEDIOXYTHIOPHENE)/POLY(4-STYRENE-SULFONATE); SULFONATE); TRANSPORT;
D O I：
10.7567/APEX.9.051601
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigate the relationship between the morphology and in-plane conductivity of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films made from aqueous dispersions with/without ethylene glycol additive. Nanometer-scale current images of the films obtained using a conductive atomic-force microscope reveal that PEDOT-rich highly conducting domains are segmented into smaller ones-with the total area of these domains being nearly constant-for larger percentages of ethylene glycol leading to higher in-plane conductivities. The in-plane transport mechanism is found to have a strong dependence on the effective thickness of insulating barriers formed by excess PSS between neighboring highly conducting domains. (C) 2016 The Japan Society of Applied Physics
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页数：4
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