Imaging of morphological changes and phase segregation in doped polymeric semiconductors

被引：30

作者：

Deschler, Felix ^{[1
,2
]}

Riedel, Daniel ^{[1
,2
]}

Deak, Andras ^{[3
]}

Ecker, Bernhard ^{[4
,5
]}

von Hauff, Elizabeth ^{[4
,5
]}

Da Como, Enrico ^{[6
]}

机构：

[1] Univ Munich, Dept Phys, Photon & Optoelect Grp, D-80799 Munich, Germany

[2] Univ Munich, CENS, D-80799 Munich, Germany

[3] Hungarian Acad Sci, Res Inst Tech Phys & Mat Sci, Budapest, Hungary

[4] Univ Freiburg, Inst Phys, Organ Photovolta & Elect Grp, D-79106 Freiburg, Germany

[5] Fraurzhofer Inst Solar Energy Syst ISE, Freiburg, Germany

[6] Univ Bath, Dept Phys, Bath BA2 7AY, Avon, England

来源：

SYNTHETIC METALS | 2015年 / 199卷

关键词：

Doping; Conjugated polymer; TCNQ; Donor acceptor; Electron microscopy; HETEROJUNCTION SOLAR-CELLS; INDIUM-TIN-OXIDE; THIN-FILMS; CONJUGATED POLYMERS; CHARGE-TRANSPORT; BULK-HETEROJUNCTION; PHOTOVOLTAIC APPLICATIONS; SURFACE MODIFICATION; ALPHA-SEXITHIOPHENE; SILICON DIOXIDE;

D O I：

10.1016/j.synthmet.2014.11.037

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electrical conductivity and morphological characteristics of two conjugated polymers, P3HT and PCPDTBT, p-doped with the strong electron acceptor tetrafluoro-tetracyanoquinodimethane (F4-TCNQ) are studied as a function of dopant concentration. By combining scanning and transmission electron microscopy, SEM and TEM, with electrical characterization, we observe a correlation between the saturation in electrical conductivity and the formation of dopant rich clusters. We demonstrate that SEM is a useful technique to observe imaging contrast for locating doped regions in thin polymer films, while in parallel monitoring the surface morphology. The results are relevant for the understanding of structure property relationships in doped conjugated polymers. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：381 / 387

页数：7

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