DOI: 10.1063/1.1469218. High-efficiency green phosphorescence from spin-coated single-layer dendrimer light-emitting diodes

High-efficiency green phosphorescence from spin-coated single-layer dendrimer light-emitting diodes

10.1063/1.1469218

Crossref journal-article

AIP Publishing

Applied Physics Letters (317)

Abstract

We demonstrate very high-efficiency green phosphorescence from a single-layer dendrimer organic light-emitting diode formed by spin-coating. A first generation fac-tris(2-phenylpyridine) iridium cored dendrimer doped into a wide-gap 4,4′-bis(N-carbazole) biphenyl host displays a peak external quantum efficiency of 8.1% (28 Cd/A) at a brightness of 3450 Cd/m2 and a current density of 13.1 mA/cm2. A peak power efficiency of 6.9 lm/W was measured at 1475 Cd/m2 and 5 mA/cm2. We attribute this exceptionally high quantum efficiency for a single-layer device to the excellent film forming properties and high photoluminescence quantum yield of the dendrimer blend and efficient injection of charge into the emissive layer. These results suggest that dendrimers are an effective method for producing efficient phosphorescent devices by spin-coating.

Bibliography

Markham, J. P. J., Lo, S.-C., Magennis, S. W., Burn, P. L., & Samuel, I. D. W. (2002). High-efficiency green phosphorescence from spin-coated single-layer dendrimer light-emitting diodes. Applied Physics Letters, 80(15), 2645â2647.

Authors 5

J. P. J. Markham (first)
S.-C. Lo (additional)
S. W. Magennis (additional)
P. L. Burn (additional)
I. D. W. Samuel (additional)

References 15 Referenced 215

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10.1016/S1566-1199(00)00003-3 / Org. Electon. (2000)
10.1063/1.1315629 / Appl. Phys. Lett. (2000)
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10.1002/1616-3028(200108)11:4<287::AID-ADFM287>3.0.CO;2-Z / Adv. Func. Mat. (2001)
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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 10:18 a.m.)
Deposited	1 year, 6 months ago (Feb. 3, 2024, 5:07 p.m.)
Indexed	4 weeks, 1 day ago (July 28, 2025, 5:58 p.m.)
Issued	23 years, 4 months ago (April 15, 2002)
Published	23 years, 4 months ago (April 15, 2002)
Published Print	23 years, 4 months ago (April 15, 2002)

Funders 0

None

BibTeX

@article{Markham_2002, title={High-efficiency green phosphorescence from spin-coated single-layer dendrimer light-emitting diodes}, volume={80}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.1469218}, DOI={10.1063/1.1469218}, number={15}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Markham, J. P. J. and Lo, S.-C. and Magennis, S. W. and Burn, P. L. and Samuel, I. D. W.}, year={2002}, month=apr, pages={2645–2647} }

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