A triphenylamine substituted quinacridone derivative for solution processed organic light emitting diodes

作者：da Cunha Marina Pilz; Thu Trang Do; Yambem Soniya D; Hong Duc Pham; Chang Samuel; Manzhos Sergei; Katoh Ryuzi; Sonar Prashant

来源：Materials Chemistry and Physics, 2018, 206: 56-63.

DOI：10.1016/j.matchemphys.2017.11.043

• Quinacridone
• Triphenylamine
• Solution process
• Fluorescence
• Organic light emitting diode

We report on a novel quinacridone derivative design, namely, 2,9-bis(4-(bis(4-methoxyphenyl)amino) phenyl)-5,12-bis(2-ethylhexyl)-5,12-dihydroquinolino[2,3-b]acridine-7,14-dione (TPA-QA-TPA) for possible use as a solution processable emissive layer in organic light emitting diodes (OLEDs). TPA-QA-TPA contains branched alkyl chains for enhanced solubility and methoxytriphenylamine moieties (TPA) as end capping groups. The end capping groups not only extend the molecular conjugation leading to a red shifted emission, but have a propeller shaped conformation. The propeller design hinders the intermolecular pi-pi stacking, hindering aggregation and hence suppressing concentration quenching of the fluorophores in the solid state. The new molecular design shows good thermal stability, with a decomposition temperature of 390 degrees C and a melting temperature of 295 degrees C. The absorption and emission maxima for TPA-QA-TPA compound are 552 and 622 nm respectively. Using TPA-QA-TPA as a dopant in tris(8-hydroxyquinolinato)aluminum (Alq(3)), organic light emitting diodes were realized in a simple device structure.

• 出版日期2018-2-15