title: Synthesis of poly(p-phenylene-vinylene) derivatives containing an oxadiazole pendant group and their applications to organic electronic devices.
abstract: Poly(p-phenylene vinylene) (PPV) derivatives with 2,5-diphenyl-1,3,4-oxadiazole-diyl (OXD) as the side chain, poly[2-{4-[5-(4-(heptyloxy)phenyl)-1,3,4-oxadiazole-2-yI]phenyl-oxy}-1,4-phenylene-vinylene] (OXH-PPV), poly[2-{4-[5-(4-(heptyloxy)phenyl)-1,3,4-oxadia-zole-2-yl]phenyl-oxy}-1,4-phenylenevinylene-co-2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene] (OXH-PPV-co-MEH-PPV), and poly[2-methoxy-5-(2'-ethylhexyl-oxy)-p-phenylene vinylene] (MEH-PPV), were synthesized via a modified Gilch route. The electron-deficient oxadiazole moiety was introduced on the side chain of the polymer backbone to increase the electron-affinity of the polymers. The electroluminescent (EL) properties of the resulting polymers as an active layer, were investigated by the fabrication of single-layer LEDs and the devices using OXH-PPV-co-MEH-PPV showed better EL properties than those using pure MEH-PPV. Also, to investigate the switching properties of the resulting polymers as an active layer, OFET devices were fabricated in a top-contact/bottom-gate configuration. The resulting FETs exhibited typical p-channel characteristics, field-effect mobility of 6.5 x 10(-4) - 7.0 x 10(-5) cm2 V(-1) s(-1), and on-off ratio of about 10(4)-10(5).
authors.affiliation: Department of Chemical Engineering, Hanbat National University, Daejeon 305-719, Republic of Korea.
authors.forename: Hyemi
authors.initials: H
authors.lastname: Lee
authors.forename: Doojin
authors.initials: D
authors.lastname: Vak
authors.forename: Kang-Jun
authors.initials: KJ
authors.lastname: Baeg
authors.forename: Yoon-Chae
authors.initials: YC
authors.lastname: Nah
authors.forename: Dong-Yu
authors.initials: DY
authors.lastname: Kim
authors.forename: Yong-Young
authors.initials: YY
authors.lastname: Noh
mesh_terms: D001393:Azoles / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D009930:Organic Chemicals / Q000737:chemistry*; D011145:Polyvinyls / Q000737:chemistry*; D014173:Transistors, Electronic
chemical_list: D001393:Azoles; D009930:Organic Chemicals; D011145:Polyvinyls; C470024:poly(4-phenylenevinylene)