Interface fermi level pinning at contacts between PEDOT:: PSS and molecular organic semiconductors

被引:32
作者
Peisert, Heiko [1 ]
Petr, Andreas [1 ]
Dunsch, Lothar [1 ]
Chasse, Thomas [1 ]
Knupfer, Martin [1 ]
机构
[1] Univ Tubingen, IPC, D-72076 Tubingen, Germany
关键词
interfaces; materials science; molecular devices; semiconductors; thin films;
D O I
10.1002/cphc.200600542
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Photoemission studies of interfaces between molecular organic semiconductors and the conducting polymer PEDOT:PSS [mixture of PEDOT (poly-3,4-ethylenedioxy-thiophene) and PSS (polystyre-nesulfonate)] demonstrate that it is impossible to control the charge injection barriers at such contacts by either a systematic change, of the. work function of the conducting polymer or that of the organic semiconductor. Instead, these interfaces are, in all cases, characterized by a charge transfer across the interface and a resulting Fermi level pinning. Thus interfacial charge barriers do not explain observed changes in device parameters as a function of the work function of the polymer electrode.
引用
收藏
页码:386 / 390
页数:5
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