Epoxy-Carbazole Polymeric Network Nanolayers for Organic Light-Emitting Devices

Park, Jin-Woo; Lee, Eung-Kyoo; Choi, Myon Cheon; Kim, Hwajeong; Keum, Jihwan; Ha, Chang-Sik; Kim, Youngkyoo

doi:https://doi.org/10.1155/JNM/2006/46787

Journal of Nanomaterials

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Nanoporous and Nanostructured Materials for Catalysis, Sensor, and Gas Separation Applications

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Volume 2006 | Article ID 046787 | https://doi.org/10.1155/JNM/2006/46787

Epoxy-Carbazole Polymeric Network Nanolayers for Organic Light-Emitting Devices

Jin-Woo Park,¹Eung-Kyoo Lee,¹Myon Cheon Choi,¹Hwajeong Kim,^1,2Jihwan Keum,^1,3Chang-Sik Ha,¹and Youngkyoo Kim⁴

Received24 Mar 2006

Revised05 Aug 2006

Accepted24 Oct 2006

Published27 Dec 2006

Abstract

We report the study of epoxy-carbazole polymeric network (ECzPN) nanolayers as a hole injection/transport layer in organic light-emitting devices. The ECzPN nanolayers were prepared by the thermal curing reaction of epoxidized cresol novolak and 3,6- diaminocarbazole in the presence of catalytic amount of triphenyl phosphine. The curing reaction was examined with Fourier transformed infrared spectroscopy, whilst the thermal stability was studied with thermogravimetric analysis. Optical absorption and emission spectroscopy were employed to investigate the optical properties of ECzPN nanolayers, whilst atomic force microscopy was used to examine the surface nanomorphology of ECzPN nanolayers. The result showed that the device performance was greatly influenced by the weight ratio of monomers, because the highest occupied molecular orbital level of ECzPN was significantly changed with the ratio. This is attributed to the ground-state complexes induced by the specific interaction (hydrogen bonding) between the lone pair electrons in amines of carbazole moieties and the hydroxyl group of ring-opened epoxide moieties.

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Copyright

Copyright © 2006 Jin-Woo Park et al. 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.

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