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Deep Blue Exciplex Organic Light-Emitting Diodes with Enhanced Efficiency; P-type or E-type Triplet Conversion to Singlet Excitons?

Jankus, Vygintas; Chiang, Chien-Jung; Dias, Fernando; Monkman, Andrew P.

Deep Blue Exciplex Organic Light-Emitting Diodes with Enhanced Efficiency; P-type or E-type Triplet Conversion to Singlet Excitons? Thumbnail


Authors

Vygintas Jankus

Chien-Jung Chiang



Abstract

Simple trilayer, deep blue, fluorescent exciplex organic light-emitting diodes (OLEDs) are reported. These OLEDs emit from an exciplex state formed between the highest occupied molecular orbital (HOMO) of N,N′-bis(1-naphthyl)N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine (NPB) and lowest unoccupied molecular orbital (LUMO) of 1,3,5-tri(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl (TPBi) and the NPB singlet manifold, yielding 2.7% external quantum efficiency at 450 nm. It is shown that the majority of the delayed emission in electroluminescence arises from P-type triplet fusion at NPB sites not E-type reverse intersystem crossing because of the presence of the NPB triplet state acting as a deep trap.

Citation

Jankus, V., Chiang, C., Dias, F., & Monkman, A. P. (2013). Deep Blue Exciplex Organic Light-Emitting Diodes with Enhanced Efficiency; P-type or E-type Triplet Conversion to Singlet Excitons?. Advanced Materials, 25(10), 1455-1459. https://doi.org/10.1002/adma.201203615

Journal Article Type Article
Publication Date Mar 13, 2013
Deposit Date May 31, 2013
Publicly Available Date Mar 29, 2024
Journal Advanced Materials
Print ISSN 0935-9648
Electronic ISSN 1521-4095
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 25
Issue 10
Pages 1455-1459
DOI https://doi.org/10.1002/adma.201203615

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Copyright Statement
This is the peer reviewed version of the following article: ankus, V., Chiang, C.-J., Dias, F. and Monkman, A. P. (2013), Deep Blue Exciplex Organic Light-Emitting Diodes with Enhanced Efficiency; P-type or E-type Triplet Conversion to Singlet Excitons?. Advanced Materials, 25 (10): 1455-1459, which has been published in final form at http://dx.doi.org/10.1002/adma.201203615. This article may be used for non-commercial purposes in accordance With Wiley-VCH Terms and Conditions for self-archiving.





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