High-efficiency polymer light-emitting devices using organic salts: A multilayer structure to improve light-emitting electrochemical cells
SCIE
SCOPUS
- Title
- High-efficiency polymer light-emitting devices using organic salts: A multilayer structure to improve light-emitting electrochemical cells
- Authors
- Lee, TW; Lee, HC; Park, OO
- Date Issued
- 2002-07-08
- Publisher
- AMER INST PHYSICS
- Abstract
- Balanced charge injection in polymer light-emitting devices is very important for high brightness and quantum efficiency. To improve the well-known light-emitting electrochemical cells (LECs), we fabricated multilayer electroluminescent devices employing an ammonium salt-containing poly(ethylene oxide) blend as hole- or electron-injecting materials. The charge injection can be greatly promoted due to the ionic space charges near both electrodes. The current-voltage-optical output characteristics of the triple-layer device using both the hole- and the electron-injecting layers are very similar to the well-known LEC devices. We obtained high quantum efficiencies of 0.9% and 1.5% photons/electron in forward- and reverse-bias field of the triple-layer device, respectively. (C) 2002 American Institute of Physics.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/9421
- DOI
- 10.1063/1.1490635
- ISSN
- 0003-6951
- Article Type
- Article
- Citation
- APPLIED PHYSICS LETTERS, vol. 81, no. 2, page. 214 - 216, 2002-07-08
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