Dianthracenylazatrioxa[8]circulene : Synthesis, Characterization and Application in OLEDs

• A soluble, green-blue fluorescent, π-extended azatrioxa[8]circulene was synthesized by oxidative condensation of a 3,6-dihydroxycarbazole and 1,4-anthraquinone by using benzofuran scaffolding. This is the first circulene to incorporate anthracene within its carbon framework. Solvent-dependent fluorescence and bright green electroluminescence accompanied by excimer emission are the key optical properties of this material. The presence of sliding π-stacked columns in the single crystal of dianthracenylazatrioxa[8]circulene is found to cause a very high electron-hopping rate, thus making this material a promising n-type organic semiconductor with an electron mobility predicted to be around 2.26 cm2 V−1 s−1. The best organic light-emitting diode (OLED) device based on the dianthracenylazatrioxa[8]circulene fluorescent emitter has a brightness of around 16 000 Cd m−2 and an external quantum efficiency of 3.3 %. Quantum dot-based OLEDs were fabricated by using dianthracenylazatrioxa[8]circulene as a host matrix material. 

Ämnesord

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Nyckelord

anthracene

circulene

organic light-emitting diodes

polycyclic aromatic hydrocarbons

synthesis

Fluorescence

Optical properties

Organic semiconductor materials

Scaffolds

Semiconductor quantum dots

Single crystals

Carbon framework

Electron hopping

Excimer emissions

External quantum efficiency

Fluorescent emitters

Green electroluminescences

N-type organic semiconductor

Oxidative condensation

Organic light emitting diodes (OLED)

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