ortho‐, meta‐, and para‐Dihydroindenofluorene Derivatives as Host Materials for Phosphorescent OLEDs |
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| 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 |
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| 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) |
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| 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. |
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| Keywords: | dihydroindenofluorenes LEDs organic semiconductors |
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