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Advances in Condensed Matter Physics
Volume 2017, Article ID 2414798, 6 pages
https://doi.org/10.1155/2017/2414798
Research Article

Characteristic Evaluation of Organic Light-Emitting Diodes Prepared with Stamp Printing Technique

Department of Physics, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand

Correspondence should be addressed to Kitsakorn Locharoenrat; ht.ca.ltimk@ol.nrokastik

Received 16 March 2017; Accepted 11 April 2017; Published 10 May 2017

Academic Editor: Kiyokazu Yasuda

Copyright © 2017 Apisit Chittawanij and Kitsakorn Locharoenrat. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We have reported on a stamp printing technique that uses PET release film as a printing stamp to deposit TPBi thin film served as the electron transport layer of the organic light-emitting diodes. TPBi thin film was printed with a good uniformity and resolution. Effect of deposition conditions on optical and electrical properties and surface roughness of TPBi thin film have been studied under spectroscopy and atomic force microscopy, respectively. It is found that characteristic of TPBi thin film is improved via controlled stamp temperature and time. Since TPBi thin film exhibits the surface morphology comparable to that of conventional spin-coating thin film, our findings suggest that PET release film-based stamp printing approach is possible to use as an alternative deposition of the organic thin film as compared with a traditional one.