Spirobifluorene-2,7-dicarbazole-4'-phosphine Oxide as Host for High-Performance Single-Layer Green Phosphorescent OLED Devices

Sebastien Thiery (1) , Denis Tondelier (2) , Bernard Geffroy (3, 2) , Emmanuel Jacques (4) , Malo Robin , Rémi Métivier (5) , Olivier Jeannin (1) , Joëlle Rault-Berthelot (1) , Cyril Poriel (1)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 LPICM - Laboratoire de physique des interfaces et des couches minces [Palaiseau]
3 LICSEN - Laboratoire Innovation en Chimie des Surfaces et NanoSciences
4 IETR - Institut d'Électronique et des Technologies du numéRique
5 PPSM - Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires

A new host material based on the 2,7,4'-substituted spirobifluorene platform has been designed and used in single-layer phosphorescent OLED with very high efficiency (EQE = 13.2%) and low turn-on voltage (2.4 V). This performance is among the best reported for green single-layer PhOLEDs and may open new avenues in the design of host materials for single-layer devices.

Domains: Chemical Sciences

Sebastien Thiery, Denis Tondelier, Bernard Geffroy, Emmanuel Jacques, Malo Robin, et al.. Spirobifluorene-2,7-dicarbazole-4'-phosphine Oxide as Host for High-Performance Single-Layer Green Phosphorescent OLED Devices. Organic Letters, 2015, 17 (19), pp.4682-4685. ⟨10.1021/acs.orglett.5b02027⟩. ⟨hal-01205439⟩