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Updated: Apr 3, 2026

Development of Efficient OLEDs from Solution Deposition
Published on: November 4, 2022
Spirobifluorene-2,7-dicarbazole-4'-phosphine Oxide as Host for High-Performance Single-Layer Green Phosphorescent
Sébastien Thiery1, Denis Tondelier2, Bernard Geffroy2,3
1UMR CNRS 6226, Institut des Sciences Chimiques de Rennes , Rennes 35042 Cedex, France.
Abstract:
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.
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