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Study on Work Function of Modified Indium Tin Oxide and Performance of Organic Electroluminescent Devices.

Published online by Cambridge University Press:  13 February 2012

Battulga Munkhbat ,
Bolormaa Gendensuren ,
Ganbaatar Tumenulzii ,
Rentsenmyadag Dashzeveg ,
Sarangerel Davaasambuu ,
Douglas F. Dyckes  and
Ganzorig Chimed
Battulga Munkhbat
Affiliation:
Center for Nanoscience and Nanotechnology and Department of Chemical Technology, School of Chemistry and Chemical Engineering, National University of Mongolia, Ulaanbaatar 14201, Mongolia
Bolormaa Gendensuren
Affiliation:
Center for Nanoscience and Nanotechnology and Department of Chemical Technology, School of Chemistry and Chemical Engineering, National University of Mongolia, Ulaanbaatar 14201, Mongolia
Ganbaatar Tumenulzii
Affiliation:
Center for Nanoscience and Nanotechnology and Department of Chemical Technology, School of Chemistry and Chemical Engineering, National University of Mongolia, Ulaanbaatar 14201, Mongolia
Rentsenmyadag Dashzeveg
Affiliation:
Center for Nanoscience and Nanotechnology and Department of Chemical Technology, School of Chemistry and Chemical Engineering, National University of Mongolia, Ulaanbaatar 14201, Mongolia
Sarangerel Davaasambuu
Affiliation:
Center for Nanoscience and Nanotechnology and Department of Chemical Technology, School of Chemistry and Chemical Engineering, National University of Mongolia, Ulaanbaatar 14201, Mongolia
Douglas F. Dyckes
Affiliation:
Department of Chemistry, University of Colorado Denver, Denver CO 80217-3364
Ganzorig Chimed
Affiliation:
Center for Nanoscience and Nanotechnology and Department of Chemical Technology, School of Chemistry and Chemical Engineering, National University of Mongolia, Ulaanbaatar 14201, Mongolia
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Abstract

The work function of the indium tin oxide electrode (ITO) modified by a self-assembled monolayer (SAM), which is used as an electrode in organic electroluminescent (EL) devices, was investigated in this study. It is revealed that chemical modification of ITO with p-substituted with different terminal groups (NH2−, Cl−, and CF3−) benzoic acids as a SAMs material with carboxyl binding group is caused to increase the work function of the ITO electrode. Through a self-assembly process, the transmittance of the ITO with a SAM was not changed. The work function change of ITO with various SAM was measured by using cyclic voltammetry. Characteristics of EL devices were increased because the energy barrier was decreased in an interface between the ITO and an organic layer in the EL devices. The correlation of the work function change and the performance of the chemically modified EL devices was estimated.

Keywords

optoelectronicself-assemblyelectrical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1402: Symposium U – Charge Generation/Transport in Organic Semiconductor Materials , 2012 , mrsf11-1402-u08-39
Copyright
Copyright © Materials Research Society 2012

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References

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