Luminance Mechanisms in Green Organic Light-Emitting Devices Fabricated Utilizing Tris(8-hydroxyquinoline)Aluminum/4,7-Diphenyl-1,10-Phenanthroline Multiple Heterostructures Acting as an Electron Transport Layer
- Authors
- Choo, Dong Chul; Seo, Su Yul; Kim, Tae Whan; Jin, You Young; Seo, Ji Hyun; Kim, Young Kwan
- Issue Date
- May-2010
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Organic Light-Emitting Diodes; Multiple Heterostructure; Electron Transport Layer; Luminance Efficiency
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.10, no.5, pp.3614 - 3618
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 10
- Number
- 5
- Start Page
- 3614
- End Page
- 3618
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/20803
- DOI
- 10.1166/jnn.2010.2274
- ISSN
- 1533-4880
- Abstract
- The electrical and the optical properties in green organic light-emitting devices (OLEDs) fabricated utilizing tris(8-hydroxyquinoline)aluminum (Alq(3))/4,7-diphenyl-1,10-phenanthroline (BPhen) multiple heterostructures acting as an electron transport layer (ETL) were investigated. The operating voltage of the OLEDs with a multiple heterostructure ETL increased with increasing the number of the Alq(3)/BPhen heterostructures because more electrons were accumulated at the Alq3/BPhen heterointerfaces. The number of the leakage holes existing in the multiple heterostructure ETL of the OLEDs at a low voltage range slightly increased due to an increase of the internal electric field generated from the accumulated electrons at the Alq(3)/BPhen heterointerface. The luminance efficiency of the OLEDs with a multiple heterostructure ETL at a high voltage range became stabilized because the increase of the number of the heterointerface decreased the quantity of electrons accumulated at each heterointerface.
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