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Thiphenylmethane based structural fragments as building blocks towards solution-processable heteroleptic iridium(III) complexes for OLED use

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Abstract

A novel structural approach to solution-processable heteroleptic iridium(III) complexes is presented. On the basis of 2-arylbenzo[d]thiazole cyclometalating main ligands and picolinic acid (pic) and acetylacetone (acac) ancillary ligands six new yellow or orange emitting materials were obtained using attached 1,1,1-triphenylmethylpentane substituents as aggregation preventing and solubility enhancing functional fragments. The obtained compounds show high photoluminescence quantum yield values in the range of 0.64 to 0.90. OLEDs with a spin-coated emissive layer were successfully prepared, with the highest achieved external quantum efficiency of 7.9%, current efficiency of 12.4 cd A−1 and power efficiency of 7.8 lm W−1, measured at luminance 6000 cd m−2. Maximal device brightness of 17 451 cd m−2 was attained.

Graphical abstract: Thiphenylmethane based structural fragments as building blocks towards solution-processable heteroleptic iridium(iii) complexes for OLED use

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Publication details

The article was received on 03 Sep 2018, accepted on 10 Nov 2018 and first published on 12 Nov 2018


Article type: Paper
DOI: 10.1039/C8NJ04484H
Citation: New J. Chem., 2019, Advance Article
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    Thiphenylmethane based structural fragments as building blocks towards solution-processable heteroleptic iridium(III) complexes for OLED use

    K. Traskovskis, A. Ruduss, V. Kokars, I. Mihailovs, N. Lesina and A. Vembris, New J. Chem., 2019, Advance Article , DOI: 10.1039/C8NJ04484H

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