Electrophosphorescent devices with solution processible emitter and hole transport layer stack
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- Title
- Electrophosphorescent devices with solution processible emitter and hole transport layer stack
- Authors
- Jae Kyun Park; Gyoung Seok Hwang; Byung Doo Chin; Nam Su Kang; Lee, TW
- Date Issued
- 2012-09
- Publisher
- ELSEVIER
- Abstract
- The light emitting behavior of the electrophosphorescent devices with solution-processible hole transport layer and light emitting layer was characterized. We have introduced the hole-transporting stacked layer composed of poly(3,4-ethylenedioxy thiophene): poly(4-styrenesulfonate) [PEDOT:PSS] and thin perfluorinated ionomer, aiming for the improvement of charge injection and transport with corresponding high efficiency behavior. In order to provide a suitable work function, composition and thickness of the ultra-thin perfluorinated ionomer was optimized for being an interfacial layer condition; 34 cd/A of green phosphorescent device was obtained while the control device without ionomer shows the luminous efficiency of 29 cd/A. Both for devices with vacuum-deposited and solution-processed electrophosphorescent emitters, change of the device efficiencies were analyzed in terms of the work function, surface chemical composition, and charge conduction behavior. (C) 2011 Elsevier B.V. All rights reserved.
- Keywords
- Electrophosphorescence; Soluble; Interface; Ionomer; DIODES; INJECTION; EFFICIENCY; INTERFACE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/15883
- DOI
- 10.1016/J.CAP.2011.04.030
- ISSN
- 1567-1739
- Article Type
- Article
- Citation
- Current Applied Physics, vol. 12, page. E38 - E41, 2012-09
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