Asymmetric Pentacene Derivatives for Organic Light-Emitting Diodes
Two aryl-substituted red emitting pentacenes, 5,6,13,14-tetraphenylpentacene (asym-TPP) and 5,14-bis(2,6-dimethylphenyl)-6,13-diphenylpentacene (DMPDPP), have been prepared and spectroscopically characterized. Guest−host films of pentacene derivatives dispersed in tris(quinolin-8-olato)aluminum(III)...
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Published in | Chemistry of materials Vol. 18; no. 2; pp. 449 - 457 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
American Chemical Society
24.01.2006
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Online Access | Get full text |
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Summary: | Two aryl-substituted red emitting pentacenes, 5,6,13,14-tetraphenylpentacene (asym-TPP) and 5,14-bis(2,6-dimethylphenyl)-6,13-diphenylpentacene (DMPDPP), have been prepared and spectroscopically characterized. Guest−host films of pentacene derivatives dispersed in tris(quinolin-8-olato)aluminum(III) (Alq3) exhibit narrow red emission (λmax = 663−680 nm), indicative of efficient Förster energy transfer from the Alq3 host to the guest molecules. Solid-state absolute photoluminescence quantum yields of the films were measured as a function of guest molecule concentration (ΦPL ∼20% at 0.20−0.50 mol %). Red light-emitting diodes based on the fluorescent DMPDPP yield external electroluminescence quantum efficiency (ηEL ∼1%) close to the theoretical limit. |
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Bibliography: | istex:6CFFA57A46A72521B90C524894DB823A5D03B12A ark:/67375/TPS-NM5259LM-H |
ISSN: | 0897-4756 1520-5002 |
DOI: | 10.1021/cm052069h |