The Curious Out-of-Plane Conductivity of PEDOT:PSS

被引:23
作者
van de Ruit, Kevin [1 ]
Katsouras, Ilias [2 ]
Bollen, Dirk [3 ]
van Mol, Ton [4 ]
Janssen, Rene A. J. [1 ]
de Leeuw, Dago M. [5 ]
Kemerink, Martijn [1 ]
机构
[1] Eindhoven Univ Technol, Dept Appl Phys, NL-5600 MB Eindhoven, Netherlands
[2] Univ Groningen, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands
[3] Agfa Gevaert NV, B-2640 Mortsel, Belgium
[4] Holst Ctr TNO, NL-5656 AE Eindhoven, Netherlands
[5] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
关键词
charge transport; conducting polymers; organic electronics; FILMS;
D O I
10.1002/adfm.201301175
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
For its application as transparent conductor in light-emitting diodes and photovoltaic cells, both the in-plane and out-of-plane conductivity of PEDOT:PSS are important. However, studies into the conductivity of PEDOT:PSS rarely address the out-of-plane conductivity and those that do, report widely varying results. Here a systematic study of the out-of-plane charge transport in thin films of PEDOT:PSS with varying PSS content is presented. To this end, the PEDOT:PSS is enclosed in small interconnects between metallic contacts. An unexpected, but strong dependence of the conductivity on interconnect diameter is observed for PEDOT:PSS formulations without high boiling solvent. The change in conductivity correlates with a diameter dependent change in PEDOT:PSS layer thickness. It is suggested that the order of magnitude variation in out-of-plane conductivity with only a 3-4-fold layer thickness variation can quantitatively be explained on basis of a percolating cluster model.
引用
收藏
页码:5787 / 5793
页数:7
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