Effect of the Thickness of the Lithium Quinolate and Aluminum Mixed Layer Acting as an Electron Injection Layer on the Efficiency of Organic Light-Emitting Devices
- Authors
- Cha, Han Moe; Choo, Dong Chul; Kim, Tae Whan; Seo, Ji Hyun; Park, Jung Hyun; Kim, Young Kwan
- Issue Date
- Aug-2008
- Publisher
- IOP PUBLISHING LTD
- Keywords
- organic light-emitting diode; mixed layer; current density; luminance efficiency
- Citation
- JAPANESE JOURNAL OF APPLIED PHYSICS, v.47, no.8, pp.6991 - 6994
- Journal Title
- JAPANESE JOURNAL OF APPLIED PHYSICS
- Volume
- 47
- Number
- 8
- Start Page
- 6991
- End Page
- 6994
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/22693
- DOI
- 10.1143/JJAP.47.6991
- ISSN
- 0021-4922
- Abstract
- The thickness of the lithium quinolate and aluminum mixed layer acting as an electron injection layer in organic light-emitting diodes (OLEDs) was optimized to enhance the efficiencies of OLEDs. The electrical properties of OLEDs with a mixed layer were compared with those of hole-rich or electron-only devices. The current densities of OLEDs with a mixed layer were lower than those of OLEDs without a mixed layer. The luminance efficiencies of OLEDs with a mixed layer were higher than those of OLEDs without a mixed layer due to an increase in electron current and a decrease in hole current, resulting in achieving more balance of electrons and holes in an emitting layer.
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