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White Organic Light Emitting Diodes using Red and Blue Phosphorescent Materials with Blocking LayerWhite Organic Light Emitting Diodes using Red and Blue Phosphorescent Materials with Blocking Layer
- Other Titles
- White Organic Light Emitting Diodes using Red and Blue Phosphorescent Materials with Blocking Layer
- Issue Date
- 2007
- Publisher
- 한국전기전자재료학회
- Keywords
- White organic light emitting diodes; Two phosphorescent dyes; Spacer; White organic light emitting diodes; Two phosphorescent dyes; Spacer
- Citation
- Transactions on Electrical and Electronic Materials, v.8, no.5, pp.218 - 221
- Journal Title
- Transactions on Electrical and Electronic Materials
- Volume
- 8
- Number
- 5
- Start Page
- 218
- End Page
- 221
- ISSN
- 1229-7607
- Abstract
- High-efficiency white organic light-emitting diodes (WOLEDs) were fabricated with two emissive layers and an blocking layer was sandwiched between two phosphorescent dopants, bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl) iridium III (FIrpic) as the blue emission and a newly synthesized red phosphorescent material guest, bis(5-acetyl-2-phenylpyridinato-N,C2') acetylacetonate ((acppy)2Ir(acac)). This blocking layer prevented a T-T annihilation in a red emissive layer, and balanced with blue and red emission as blocking of hole carriers. The white device showed Commission Internationale d’Eclairage (CIEx,y) coordinates of (0.317, 0.425) at 22400 cd/m2, a maximum luminance of 27300 cd/m2 at 268 mA/cm2, a maximum luminous efficiency and power efficiency of 26.9 cd/A and 18.6 lm/W.
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Collections - College of Engineering > Department of Science > 1. Journal Articles
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Related Researcher
- Kim, Young Kwan
- Engineering (Applied Science)