Single layer light-emitting diodes from copolymers comprised of   mesogen-jacketed polymer containing oxadiazole units and PVK

doi:10.1002/pola.22529

CORC > 北京大学 > 化学与分子工程学院

	Single layer light-emitting diodes from copolymers comprised of mesogen-jacketed polymer containing oxadiazole units and PVK
	Wang, Ping ; Chai, Chunpeng ; Wang, Fuzhi ; Chuai, Yutao ; Chen, Xiaofang ; Fan, Xinghe ; Zou, Dechun ; Zhou, Qifeng
刊名	journal of polymer science part a polymer chemistry
	2008
关键词	copolymerization functionalization of polymers light-emitting diodes luminescence CARRIER TRANSPORT ABILITIES CONJUGATED POLYMERS ELECTROLUMINESCENT DIODES SIDE-CHAIN POLY(N-VINYLCARBAZOLE) EFFICIENCY MOIETY
DOI	10.1002/pola.22529
英文摘要	A series of copolymers PCt-co-Poly(N-vinylcarbazole) were synthesized through common radical polymerization, in which P-Ct as a kind of mesogen-jacketed liquid crystalline polymer was introduced, and the effects of copolymers composing variation on the optical properties of the polymers were studied. The structures and properties of the copolymers were characterized and evaluated by thermogravimetric (TGA), UV, photoluminescence (PL), cyclic voltammetry (CV), and electroluminescence (EL) analyses. All the polymers enjoy high thermal stability. PL peaks in the film show blue-shift compared with in solutions and fluorescent quantum efficiency decreased with the N-vinylcarbazole (nvk) content increasing, which supported the efficient energy transfer from nvk units to the oxadiazole units. CV revealed that, with the incorporation of nvk to the copolymer, these copolymers had high-lying HOMO energy levels ranging from -5.94 to -6.09 eV. Single-layer light-emitting diodes (LEDs) with the configuration of ITO/PEDOT/PCt-nvk/Mg:Ag/Ag were fabricated, which emit a blue light around 450 and 490 nm with a maximum luminance of 703 cd/m(2). The device performance varies with the content of nvk and device configuration, with device configuration (b) and PCt-nvk8 giving the best value of external quantum efficiency of 0.27%. We show here that by proper design copolymer structure and modification of device configuration can exhibit strong blue EL in higher external quantum efficiency. (c) 2008 Wiley Periodicals, Inc.; Polymer Science; SCI(E); EI; 15; ARTICLE; 5; 1843-1851; 46
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/151514]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Wang, Ping,Chai, Chunpeng,Wang, Fuzhi,et al. Single layer light-emitting diodes from copolymers comprised of mesogen-jacketed polymer containing oxadiazole units and PVK[J]. journal of polymer science part a polymer chemistry,2008.
APA	Wang, Ping.,Chai, Chunpeng.,Wang, Fuzhi.,Chuai, Yutao.,Chen, Xiaofang.,...&Zhou, Qifeng.(2008).Single layer light-emitting diodes from copolymers comprised of mesogen-jacketed polymer containing oxadiazole units and PVK.journal of polymer science part a polymer chemistry.
MLA	Wang, Ping,et al."Single layer light-emitting diodes from copolymers comprised of mesogen-jacketed polymer containing oxadiazole units and PVK".journal of polymer science part a polymer chemistry (2008).