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Enhancement of the efficiency and the color stabilization in green organic light-emitting devices with multiple heterostructures acting as a hole transport layer
- Authors
- Lee, D. U.; Yoon, Y. B.; Baek, S. H.; Kim, T. W.; Seo, J. H.; Kim, Y. K.
- Issue Date
- 1-Apr-2008
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- organic light-emitting device; multiple heterostructure; color stabilization
- Citation
- THIN SOLID FILMS, v.516, no.11, pp.3627 - 3632
- Journal Title
- THIN SOLID FILMS
- Volume
- 516
- Number
- 11
- Start Page
- 3627
- End Page
- 3632
- ISSN
- 0040-6090
- Abstract
- The electrical and the optical properties of organic light-emitting devices (OLEDs), with and without multiple heterostructures consisting of N, N-bis-(1-naphthyl)-N, N-diphenyl-1,1-biphenyl-4,4-diamine (NPB)/5,6,11,12-tetraphenylnaphthacene (rubrene) acting as a hole transport layer (HTL), were investigated. The OLEDs with 3 periods of NPB/mixed rabrene:NPB multiple heterostructures acting as an HTL showed the highest luminances and efficiencies. While the electroluminescence (EL) peak corresponding to the rubrene layer did not appear for the OLEDs with 3 periods of NPB/mixed rubrene:NPB multiple heterostructures, only the EL peak related to the tris (8-hydroxyquinoline) aluminum layer was observed. The Commission Internationale de l'Eclairage chromaticity coordinates of the OLEDs with 3 periods of NPB/mixed rubrene:NPB multiple heterostructures at 14 V were (0.321, 0.531), indicative of a deep stabilized green color. (c) 2007 Elsevier B.V. All rights reserved.
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Related Researcher
- Kim, Young Kwan
- Engineering (Applied Science)