Effect of polymer chain structure on electroluminescence of poly(4-diphenylaminostyrene)/Alq3 blend films

• Published in: Polymer journal Vol. 42; no. 11; pp. 875 - 879
• Main Authors: Natori, Itaru, Natori, Shizue, Sekikawa, Hiroyuki, Ogino, Kenji
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 01.11.2010; Nature Publishing Group
• Subjects: 639/624/1020; 639/638/455/959; Applied sciences; Biomaterials; Bioorganic Chemistry; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Electronics; Exact sciences and technology; Optoelectronic devices; Organic polymers; original-article; Physicochemistry of polymers; Polymer Sciences; Polymers with particular properties; Preparation, kinetics, thermodynamics, mechanism and catalysts; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Surfaces and Interfaces; Thin Films; poly(4-diphenylaminostyrene); living anionic polymerization; electroluminescence; Alq; polymer chain structure; Structure effect; Tacticity; Electrical properties; Brightness; Hole mobility; Electroluminescence; Luminescent material; Aluminium complex; Experimental study; Functional polymer; Styrene derivative polymer; Binary mixture; Monodispersed polymer; Amine polymer; Preparation; Organic light emitting diodes; Anionic polymerization; Drift mobility
• ISSN: 0032-3896; 1349-0540
• DOI: 10.1038/pj.2010.90

Three types of poly(4-diphenylaminostyrene) (PDAS) having different polymer chain structures were prepared by living anionic polymerization, and the electroluminescence of PDAS/tris(8-hydroxyquinoline) aluminum (Alq 3 ) blend films was examined to obtain basic information of PDAS for application to organic light-emitting diodes (OLEDs). The hole drift mobility of PDAS was on the order of 10 −4 to 10 −5 (cm 2  V −1  s −1 ) with a negative slope, and it increased with an increase in the syndiotactic configuration in the polymer chain. The current density, turn-on voltage and brightness were also improved with an increase in the syndiotactic configuration of PDAS. Three types of poly(4-diphenylaminostyrene) (PDAS) having different polymer chain structures were prepared by living anionic polymerization, and the electroluminescence of PDAS/tris(8-hydroxyquinoline) aluminum (Alq 3 ) blend films was examined. The hole drift mobility of PDAS increased with an increase in the syndiotactic configuration. The current density, turn-on voltage and brightness were also improved with an increase in the syndiotactic configuration of PDAS.