文献类型：期刊文献

英文题名：Monochromic red-emitting nonconjugated copolymers containing double-carrier-trapping phosphine oxide Eu3+ segments: Toward bright and efficient electroluminescence

作者：Xu, Hui[1]; Zhu, Rui[2]; Zhao, Ping[3]; Huang, Wei[2]

机构：[1] Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education and School of Chemistry and Materials, Heilongjiang University, 74 XueFu Road, Harbin 150080, China; [2] Institute of Advanced Materials, Jiangsu Key Laboratory of Organic Electronics and Flat-Panel Displays, Nanjing University of Posts and Telecommunications, 66 XinMoFan Road, Nanjing 210003, China; [3] Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, China

年份：2011

卷号：115

期号：31

起止页码：15627

外文期刊名：Journal of Physical Chemistry C

收录：EI(收录号：20113214227521)

语种：英文

外文关键词：Efficiency - Luminance - Electroluminescence - Europium compounds

摘要：Two metallopolymers P1 and P2 were prepared by using a novel polymerizable Eu3+ complex Eu(TTA)3VBADPO (EuMA) (TTA = 2-thenoyltrifluoroacetonate) and vinylcarbazole as the monomers in the ratios of 1:99 and 3:97, respectively, in which VBADPO is 2-(diphenylphosphoryl)-N-(2- (diphenylphosphoryl)-4-methoxyphenyl)-4-methoxy-N-(4-vinylbenzyl)aniline as a polymerizable aryl phosphine oxide ligand with a bipolar structure. The copolymers exhibit the excellent optical properties with photoluminescence quantum yield more than 60% in film. Both Gaussian simulation and electrochemical analysis indicated that the Eu3+-complexed segments form double-carrier traps (Eu-trap) in the copolymers with depth of 0.1 eV for the hole and 0.7 eV for the electron. The single-layer spin-coated devices of P1 and P2 realized the pure red emissions from Eu3+ ions. The biggest luminance of 149.1 cd m-2 was achieved, which is the highest among those of electroluminescent (EL) Eu3+-containing copolymers reported so far. The unusual efficiency stability proves the limited concentration quenching and T-T annihilation in P1 and P2 due to the uniform dispersion of emissive Eu3+ chelate moieties in the host matrix. With the high brightness and very stable efficiencies, P1 is favorable among the high-performance Eu3+-containing copolymers. It is also proved that the formation of carrier-traps in the copolymers is effective to improve EL performances. ? 2011 American Chemical Society.