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Highly efficient exciplex phosphorescence from organic light-emitting diodes

Virgili, D.; Cocchi, M.; Fattori, V.; Sabatini, C.; Kalinowski, J.; Williams, J.A.G.

Authors

D. Virgili

M. Cocchi

V. Fattori

C. Sabatini

J. Kalinowski



Abstract

The efficiency of organic exciplex light-emitting-devices (EXLEDs) can be greatly improved by introduction of a phosphorescent sensitizer with a high electronic affinity. In the electron–hole combination process at the electron donor/acceptor interface, solely singlet exciplexes are generated producing the exciplex fluorescence. A phosphor sensitizer allows the formation in the emitter bulk of triplet exciplexes, which yield highly efficient exciplex phosphorescence. As an example, we use a Pt-based phosphor (PtL2Cl) doped into a star-burst amine hole transporting donor (m-MTDATA) and bathophenanthroline (BPT) electron-transporting acceptor system which in a bi-layer EXLED reveals an exciplex high electro-phosphorescence external quantum yield of 2.4% photon/carrier.

Citation

Virgili, D., Cocchi, M., Fattori, V., Sabatini, C., Kalinowski, J., & Williams, J. (2006). Highly efficient exciplex phosphorescence from organic light-emitting diodes. Chemical Physics Letters, 433(1-3), 145-149. https://doi.org/10.1016/j.cplett.2006.11.033

Journal Article Type Article
Publication Date 2006
Journal Chemical Physics Letters
Print ISSN 0009-2614
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 433
Issue 1-3
Pages 145-149
DOI https://doi.org/10.1016/j.cplett.2006.11.033