Exciplex emission from electroluminescent ladder-type pentaphenylene oligomers bearing both electron- and hole-accepting substituents.

Exciplex emission from electroluminescent ladder-type pentaphenylene oligomers bearing both electron- and hole-accepting substituents. Research Abstract Details 

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Exciplex emission from electroluminescent ladder-type pentaphenylene oligomers bearing both electron- and hole-accepting substituents. Abstract Text:

Chris E Finlayson,Ji-Seon Kim,Matthew J Liddell,Richard H Friend,Sung-Hyun Jung,Andrew C Grimsdale,Klaus Müllen,

We examine the photophysical properties of ladder-type pentaphenylenes, which have been prepared as prototypical "all-in-one" emissive materials bearing both electron-accepting (diaryloxadiazole) and electron-donating (triphenylamine) units. We find that donor-acceptor interactions are very dependent on the nature of the connectivity of these groups to the main pentaphenylene chain. When the oxadiazole and triphenylamine units were substituted on opposite sides of the pi-conjugated pentaphenylene chromophore, photoluminescence with long lifetimes typical of exciplex-like species was observed, while being significantly quenched by intermolecular charge separation between the substituents. By contrast, when the triphenylamine units were attached at the ends of the chromophore, no such effects were observed and a blue/green photoluminescence was obtained with very high quantum efficiency. In this latter configuration, evidence of ambipolar charge transport and a blue/green electroluminescence were additionally observed.

Exciplex emission from electroluminescent ladder-type pentaphenylene oligomers bearing both electron- and hole-accepting substituents. Publishing Authors By Initials

CE Finlayson,JS Kim,MJ Liddell,RH Friend,SH Jung,AC Grimsdale,K Müllen,

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Exciplex emission from electroluminescent ladder-type pentaphenylene oligomers bearing both electron- and hole-accepting substituents. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The Journal of chemical physics

VOLUME: 128

Page Numbers: 044703

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ISSN: 0021-9606

DAY: 28

MONTH: Jan

YEAR: 2008

Exciplex emission from electroluminescent ladder-type pentaphenylene oligomers bearing both electron- and hole-accepting substituents. Information

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LANGUAGE: eng

NlmUniqueID: 375360

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Grant and Affiliation Information for Exciplex emission from electroluminescent ladder-type pentaphenylene oligomers bearing both electron- and hole-accepting substituents.

AFFILIATION: Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.

Country: United States

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MEDLINETA: J Chem Phys

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