Modulation of the Physicochemical Properties of Donor–Spiro–Acceptor Derivatives through Donor Unit Planarisation: Phenylacridine versus Indoloacridine. New Hosts for Green and Blue Phosphorescent Organic Light-Emitting Diodes (PhOLEDs)

Abstract : This work reports a detailed structure–property relationship study of a series of efficient host materials based on the donor–spiro–acceptor (D-spiro-A) design for green and sky-blue phosphorescent organic light-emitting diodes (PhOLEDs). The electronic and physical effects of the indoloacridine (IA) fragment connected through a spiro bridge to different acceptor units, namely, fluorene, dioxothioxanthene or diazafluorene moiety, have been investigated in depth. The resulting host materials have been easily synthesised through short, efficient, low-cost, and highly adaptable synthetic routes by using common intermediates. The dyes possess a very high triplet energy (ET) and tuneable HOMO/LUMO levels, depending on the strength of the donor/acceptor combination. The peculiar electrochemical and optical properties of the IA moiety have been investigated though a fine comparison with their phenylacridine counterparts to study the influence of planarisation. Finally, these molecules have been incorporated as hosts in green and sky-blue PhOLEDs. For the derivative SIA-TXO2 as a host, external quantum efficiencies as high as 23 and 14 % have been obtained for green and sky-blue PhOLEDs, respectively.
Document type :
Journal articles
Complete list of metadatas

https://hal-cea.archives-ouvertes.fr/cea-01343143
Contributor : Serge Palacin <>
Submitted on : Thursday, July 7, 2016 - 3:49:16 PM
Last modification on : Wednesday, March 27, 2019 - 4:20:04 PM

Links full text

Identifiers

Citation

Sébastien Thierry, Denis Tondelier, Bernard Geffroy, Olivier Jeannin, Joelle Rault-Berthelot, et al.. Modulation of the Physicochemical Properties of Donor–Spiro–Acceptor Derivatives through Donor Unit Planarisation: Phenylacridine versus Indoloacridine. New Hosts for Green and Blue Phosphorescent Organic Light-Emitting Diodes (PhOLEDs). Chemistry - A European Journal, Wiley-VCH Verlag, 2016, 22 (29), pp.10136-10149. ⟨10.1002/chem.201600652⟩. ⟨cea-01343143⟩

Share

Metrics

Record views

309