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Moisture Effect on Polythiophene Electroluminescence

Published online by Cambridge University Press:  10 February 2011

Tsu-Chien Weng ,
Bih-Yaw Jin ,
Ding-Kuo Ding  and
Mitsuhiko Sakakibara
Tsu-Chien Weng
Affiliation:
Department of Chemistry, National Taiwan University, Taipei, Taiwan 106 ROC
Bih-Yaw Jin
Affiliation:
Department of Chemistry, National Taiwan University, Taipei, Taiwan 106 ROC
Ding-Kuo Ding
Affiliation:
TECO Electric & Machinery Co., LTD., Taipei, Taiwan 102 ROC &International Center for Materials Research, Kawasaki, Kanagawa 213 Japan
Mitsuhiko Sakakibara
Affiliation:
Japan Synthetic Rubber Co., LTD.Tsukuba, Ibaraki 305, Japan
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Abstract

The moisture effect on the neutral and charged thiophene oligomers was investigated using ab initio methods. The influence of water molecules on the geometric relaxation of the neutral and charged tert-thiophenes is found to be important. The torsional distortion in neutral water/tert-thiophene complexes is larger than that of undoped or charged complexes. The relative orientation of the water molecule to thiophene changes dramatically upon the hole injection. The existence of water molecules in the polythiophene suppresses the hole mobility and, therefore, diminishes the efficiency of electroluminescence.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 488: Symposium J – Electrical, Optical & Magnetic Properties of Organic IV , 1997 , 599
Copyright
Copyright © Materials Research Society 1998

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