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The development of a new approach toward lanthanide-based OLED fabrication: new host materials for Tb-based emitters

To develop the recently proposed approach toward host selection for lanthanide-based emitters, four phosphine oxides PO = PO1-PO4 were investigated which are able to both increase the electron mobility and to sensitize terbium luminescence. New highly soluble and brightly luminescent terbium complex...

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Published in:Dalton transactions : an international journal of inorganic chemistry 2018-11, Vol.47 (45), p.16350-16357
Main Authors: Aslandukov, Andrey N, Utochnikova, Valentina V, Goriachiy, Dmitry O, Vashchenko, Andrey A, Tsymbarenko, Dmitry M, Hoffmann, Michael, Pietraszkiewicz, Marek, Kuzmina, Natalia P
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cited_by cdi_FETCH-LOGICAL-c315t-33cd6b25afbf826ca2e5b465ae6d8828cc35a65bcc27ce0aa2ff0256709b3cb73
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container_end_page 16357
container_issue 45
container_start_page 16350
container_title Dalton transactions : an international journal of inorganic chemistry
container_volume 47
creator Aslandukov, Andrey N
Utochnikova, Valentina V
Goriachiy, Dmitry O
Vashchenko, Andrey A
Tsymbarenko, Dmitry M
Hoffmann, Michael
Pietraszkiewicz, Marek
Kuzmina, Natalia P
description To develop the recently proposed approach toward host selection for lanthanide-based emitters, four phosphine oxides PO = PO1-PO4 were investigated which are able to both increase the electron mobility and to sensitize terbium luminescence. New highly soluble and brightly luminescent terbium complexes TbCl3(PO)·H2O and Tb(pobz)3(PO)·(CH3)2CO (pobz- = phenoxybenzoate) with a quantum yield of up to 100% were synthesized and thoroughly characterized. To study the electroluminescence properties of these materials, a series of solution-processed OLED devices were fabricated and their heterostructures were selected based on the HOMO and LUMO energies of PO1-PO4, which were carefully assessed by the combination of DFT and TDDFT methods. Thus, the effectiveness of the proposed approach was proved, and the influence of the anionic ligand was shown. The maximum OLED luminance reached 75 Cd m-2, which is a high value for solution-processed OLEDs based on terbium complexes.
doi_str_mv 10.1039/C8DT02911C
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subjects Diodes
Electroluminescence
Electron mobility
Emitters
Emitters (electron)
Heterostructures
Molecular orbitals
Organic light emitting diodes
Terbium
title The development of a new approach toward lanthanide-based OLED fabrication: new host materials for Tb-based emitters
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