Efficiency Stabilization in Blue Organic Light-Emitting Devices Fabricated Utilizing a Double Emitting Layer with Fluorescence and Phosphorescence Doped Layers
- Authors
- Bang, Hyun Sung; Choo, Dong Chul; Kim, Tae Whan; Park, Jung-Hyun; Seo, Ji-Hyun; Kim, Young Kwan
- Issue Date
- Jan-2009
- Publisher
- TAYLOR & FRANCIS LTD
- Keywords
- blue emitting layer; efficiency stabilization; fluorescence; luminance efficiency; organic light-emitting devices; phosphorescence
- Citation
- MOLECULAR CRYSTALS AND LIQUID CRYSTALS, v.498, pp.265 - 273
- Indexed
- SCIE
SCOPUS
- Journal Title
- MOLECULAR CRYSTALS AND LIQUID CRYSTALS
- Volume
- 498
- Start Page
- 265
- End Page
- 273
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/177384
- DOI
- 10.1080/15421400802619388
- ISSN
- 1542-1406
- Abstract
- The luminance efficiency of the blue organic light-emitting devices (OLEDs) fabricated utilizing a double emitting layer (DEML) with a 4,4'-Bis(2,2-diphenyl-ethen-1-yl)diphenyl (DPVBi) layer doped with 4,4'-Bis[4-(diphenylamino)styryl]biphenyl (BDAVBi) fluorescence dopant and a 4,4'-Bis(carbazol-9-yl)biphenyl (CBP) layer doped with a bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl)iridium III (FIrpic) phosphorescence dopant at 20mA/cm(2) was 6.2 cd/A, indicative of highly efficient OLEDs. Electroluminescence spectra for the OLEDs with a DEML showed that a dominant peak at 469nm corresponding to the BDAVBi doped DPVBi layer together with a shoulder at 491nm related to the combination of the BDAVBi doped DPVBi layer and the FIrpic doped CBP layer appeared.
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