54.2: Tandem White OLEDs Combining Fluorescent and Phosphorescent Emission

Tandem white OLEDs with fluorescent and phosphorescent emission have been fabricated. Their electroluminescence performance is dependent on fluorescent blue‐emitting portion in a white spectrum. When CIEx = 0.33, CIEy = 0.35, the devices can achieve 22% external quantum efficiency, 50 cd/A, 25 lm/W,...

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Bibliographic Details
Published in:SID International Symposium Digest of technical papers 2008-05, Vol.39 (1), p.818-821
Main Authors: Liao, Liang-Sheng, Ren, Xiaofan, Begley, William J., Tyan, Yuan-Sheng, Pellow, Cynthia A.
Format: Article
Language:English
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Summary:Tandem white OLEDs with fluorescent and phosphorescent emission have been fabricated. Their electroluminescence performance is dependent on fluorescent blue‐emitting portion in a white spectrum. When CIEx = 0.33, CIEy = 0.35, the devices can achieve 22% external quantum efficiency, 50 cd/A, 25 lm/W, and ∼10,000 h lifetime, tested at 6.2 V and 1000 nits. If the blue‐emitting portion is reduced to produce color with CIEx = 0.34, CIEy = 0.40, the devices can exhibit ∼23% external quantum efficiency, 57 cd/A, 30 lm/W, and ∼30,000 h lifetime when tested at 5.9 V and 1000 nits.
ISSN:0097-966X
2168-0159
DOI:10.1889/1.3069795