Synthesis and Characterization of Oxazaborinin Phosphonate for Blue OLED Emitter Applications

Köhling, Jonas; Kozel, Volodymyr; Jovanov, Vladislav; Pajkert, Romana; Tverdomed, Sergey N.; Gridenco, Oleg; Fugel, Malte; Grabowsky, Simon; Röschenthaler, Gerd-Volker; Wagner, Veit (2019). Synthesis and Characterization of Oxazaborinin Phosphonate for Blue OLED Emitter Applications. ChemPhysChem, 20(5), pp. 665-671. Wiley-VCH 10.1002/cphc.201801087

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A blue‐light emitting material based on a boron complex containing heteroaromatic phosphonate ligand is synthesized and characterized. The Phospho‐Fries rearrangement is used in the synthesis route of the ligand as a convenient method of introducing phosphonate groups into phenols. Structural, thermal and photophysical properties of the resulting oxazaborinin phosphonate compound have been characterized. DFT geometry optimizations were studied as well as the spatial position and symmetry of the HOMO and LUMO. Good thermal stability up to 250 °C enables vacuum deposition methods next to solution processing. Combining the work function with the optical band gap from UV‐Vis measurements shows that band alignment is possible with standard contact materials. Photoluminescence reveals an emission peak at 428 nm, which is suitable for a blue light‐emitter.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Grabowsky, Simon

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry

ISSN:

1439-4235

Publisher:

Wiley-VCH

Language:

English

Submitter:

Simon Grabowsky

Date Deposited:

20 Jan 2020 11:07

Last Modified:

20 Jan 2020 11:07

Publisher DOI:

10.1002/cphc.201801087

BORIS DOI:

10.7892/boris.138402

URI:

https://boris.unibe.ch/id/eprint/138402

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