Chang Y.-JJYE-SHANE YANGChang Y.JChow T.J.2022-12-142022-12-14202200094536https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131816987&doi=10.1002%2fjccs.202200165&partnerID=40&md5=aa826cd73fb7078592130a6c0f8e2d95https://scholars.lib.ntu.edu.tw/handle/123456789/626217A series of poly(p-phenylenevinylene) (PPV) type dyes: QoBp, QoBm, QpBp, and QpBm containing biphenyl (B) and 8-alkoxyquinoline (Q) moieties connected at either ortho (o) or para (p) position are synthesized for the application of organic light-emitting diodes. The structure design takes the advantages of the good luminescent property of biphenylvinylene and the electron transporting nature of quinolinol. Two polymeric materials: poly-QoBp and poly-QoAp were also prepared, whereas the biphenyl moiety of the latter was replaced by a para-hydroquinone (Ap) moiety. All compounds exhibited high thermal stability with Td values exceeding 300°C. A typical blue light device made with QoBp showed a turn-on voltage of 4 V, a maximal intensity of 2.30 × 103 cd/m2 at 20 V, and a highest external quantum efficiency (EQE) of 0.43%. Devices of the polymers were made by doping into PVK. The device made with poly-QoBp exhibited a turn-on voltage of 9.5 V, and a maximal intensity of 360 cd/m2 at 15 V. A white light device was made successfully by the combination of the blue emission of QoBp and the red emission of 2,3-bisindolyl-N-methylmaleimide. It showed a maximal intensity of 940 cd/m2 at 15 V with a highest EQE of 0.14%. © 2022 The Chemical Society Located in Taipei & Wiley-VCH GmbH.biphenyl; bisquinoline; electroluminescence; hydroxyquinoline; OLED; PPV[SDGs]SDG7journal article10.1002/jccs.2022001652-s2.0-85131816987