Highly efficient exciplex phosphorescence from organic light-emitting diodes

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

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
• Electronic ISSN: 1873-4448
• 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
• Public URL: https://durham-repository.worktribe.com/output/1575290