Improvement of quantum efficiency in polymer light-emitting diodes by a single-ion conductor
SCIE
SCOPUS
- Title
- Improvement of quantum efficiency in polymer light-emitting diodes by a single-ion conductor
- Authors
- Lee, TW; Park, OO
- Date Issued
- 2000-05-29
- Publisher
- AMER INST PHYSICS
- Abstract
- Polymer light-emitting diodes were fabricated using poly[2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene] as an emissive material. Sodium ionic polyurethane (NaPU), a single-ion conductor (SIC), was employed as an electron-injecting material and compared with the case of sodium sulfonated polystyrene (SSPS). The quantum efficiency was greatly enhanced, compared with the SSPS-based device. The electron injection in the NaPU-based device is more favorable, compared with the SSPS-based device because of a larger ionic space charge accumulation near the cathode by the good chain segmental motion of the soft block in the polymer chains of the SIC. Thus, a balanced injection of an electron-hole pair can be achieved to greatly improve the quantum efficiency. (C) 2000 American Institute of Physics. [S0003-6951(00)01522-9].
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/9392
- DOI
- 10.1063/1.126616
- ISSN
- 0003-6951
- Article Type
- Article
- Citation
- APPLIED PHYSICS LETTERS, vol. 76, no. 22, page. 3161 - 3163, 2000-05-29
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