High power efficiency phosphorescent poly(dendrimer) OLEDs

We show that it is possible to produce an efficient solution-processable phosphorescent poly(dendrimer) OLED with a 32 lm/W power efficiency at 100 cd/m2 without using a charge transporting host or any improvements in light extraction. This is achieved by using the dendrimer architecture to control...

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Bibliographic Details
Published in:Optics express 2012-03, Vol.20 Suppl 2 (S2), p.A213-A218
Main Authors: Levell, J W, Zhang, S, Lai, W-Y, Lo, S-C, Burn, P L, Samuel, I D W
Format: Article
Language:English
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Summary:We show that it is possible to produce an efficient solution-processable phosphorescent poly(dendrimer) OLED with a 32 lm/W power efficiency at 100 cd/m2 without using a charge transporting host or any improvements in light extraction. This is achieved by using the dendrimer architecture to control inter-chromophore interactions. The effects of using 4,4',4″-tris(N-carbazolyl)triphenylamine (TCTA) as a charge transporting host and using a double dendron structure to further reduce inter-chromophore interactions are also reported.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.20.00A213