Successive solvent-treated PEDOT:PSS electrodes for flexible ITO-free organic photovoltaics

被引：65

作者：

Yeo, Jun-Seok ^{[1
]}

Yun, Jin-Mun ^{[1
]}

Kim, Dong-Yu ^{[1
]}

Kim, Seok-Soon ^{[2
]}

Na, Seok-In ^{[3
,4
]}

机构：

[1] Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea

[2] Kunsan Natl Univ, Sch Mat Sci & Chem Engn, Kunsan 753701, Chonbuk, South Korea

[3] Chonbuk Natl Univ, Profess Grad Sch Flexible & Printable Elect, Jeonju Si 561756, Jeollabuk Do, South Korea

[4] Chonbuk Natl Univ, Polymer Mat Fus Res Ctr, Jeonju Si 561756, Jeollabuk Do, South Korea

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2013年 / 114卷

基金：

新加坡国家研究基金会;

关键词：

Organic photovoltaics; PEDOT:PSS; Conjugated polymers; Transparent electrode; Polymer anodes; POLYMER SOLAR-CELLS; WORK FUNCTION; FILMS; CONDUCTIVITY; TRANSPARENT; EFFICIENCY; DEVICES; LAYERS; OXIDE;

D O I：

10.1016/j.solmat.2013.02.031

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

We report an effective 2-step solvent treatment combined with a polar solvent vapor annealing process (PSVA) and a dipping process using polar solvents (DP) to enhance the electrical conductivity of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films, which is highly desirable for the fabrication of solution-processed organic photovoltaics (OPVs) on flexible substrates. The PSVA and DPtreated PEDOT:PSS films showed conductivities up to 1475 S/cm. The changes in conductivity, surface morphology, composition, and conformational PEDOT chains are investigated to elucidate the effect of the 2-step PSVA and DP treatment on PEDOT:PSS films. The highly segregated-PSS component induced by PSVA was effectively removed from the PEDOT:PSS films after successive DP treatments, eventually resulting in an enhanced conductivity of bulk films. We also employed optimized PEDOT:PSS films treated by the 2-step PSVA and DP-process as transparent anodes for indium tin oxide (ITO)-free OPVs fabricated on flexible substrates. The device performance of flexible OPVs with PSVA and DP-treated films was further improved due to the increased conductivity and decreased series resistance of devices and showed highly comparable cell-efficiency with ITO-based flexible OPVs. These results suggest that the 2-step solvent-treated PEDOT:PSS film is a promising alternative to ITO for realization of high-efficiency, flexible, and low-cost ITO-free OPVs with facile manufacturing process. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：104 / 109

页数：6

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