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Direct measurement of the singlet generation yield in polymer light-emitting diodes

Rothe, C.; King, S.M.; Monkman, A.P.

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Authors

C. Rothe

S.M. King



Abstract

In this study, the singlet and triplet exciton generation yields of a representative blue-emitting conjugated polymer are directly compared using simultaneous optical and electrical excitation measurements. After carefully accounting for bimolecular triplet annihilation and knowing the independently measured solid state inter-system-crossing yield of the polymer, a singlet generation yield of 44% is obtained, in the working device, which is clearly in excess of the simple quantum statistical 25% limit.

Citation

Rothe, C., King, S., & Monkman, A. (2006). Direct measurement of the singlet generation yield in polymer light-emitting diodes. Physical Review Letters, 97(7), https://doi.org/10.1103/physrevlett.97.076602

Journal Article Type Article
Publication Date Aug 1, 2006
Deposit Date Sep 10, 2007
Publicly Available Date Mar 28, 2024
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 97
Issue 7
DOI https://doi.org/10.1103/physrevlett.97.076602
Keywords Triplet formation, Electroluminescence, Polyfluorene, Efficiency, Devices.

Files

Published Journal Article (317 Kb)
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Copyright Statement
© 2006 by The American Physical Society. All rights reserved.





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