ortho‐, meta‐, and para‐Dihydroindenofluorene Derivatives as Host Materials for Phosphorescent OLEDs |
| |
| Authors: | Maxime Romain Sébastien Thiery Anna Shirinskaya Dr Céline Declairieux Dr Denis Tondelier Bernard Geffroy Dr Olivier Jeannin Dr Joëlle Rault‐Berthelot Dr Rémi Métivier Dr Cyril Poriel |
| |
| Affiliation: | 1. UMR CNRS 6226‐ISCR‐Université de Rennes 1, 35042 Rennes cedex (France);2. UMR CNRS 7647,LPICM‐école Polytechnique, 91128 Palaiseau (France);3. LICSEN/IRAMIS/NIMBE, CEA Saclay, 91191 Gif Sur Yvette (France);4. UMR CNRS 8531‐PPSM, ENS Cachan, 94235 Cachan (France) |
| |
| Abstract: | This work reports the first structure–properties relationship study of ortho 2,1‐c]‐, meta 1,2‐a]‐, and para 1,2‐b]dihydroindenofluorenes, highlighting the influence of bridge rigidification on the electronic properties. This study has made it possible to devise an extended π‐conjugated molecule with both a high triplet state energy level and excellent thermal and morphological stability. As a proof of concept, dihydroindenofluorenes were used as the host in sky‐blue phosphorescent organic light‐emitting diodes (PhOLEDs) w ith high performance. |
| |
| Keywords: | dihydroindenofluorenes LEDs organic semiconductors |
|
|
