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[1,2];Zhu, Rui[3];Zhao, Ping[4,5];Huang, Wei[3]

机构：[1]Heilongjiang Univ, Key Lab Funct Inorgan Mat Chem, Minist Educ, Harbin 150080, Peoples R China;[2]Heilongjiang Univ, Sch Chem & Mat, Harbin 150080, Peoples R China;[3]Nanjing Univ Posts & Telecommun, Inst Adv Mat, Jiangsu Key Lab Organ Elect & Flat Panel Displays, Nanjing 210003, Peoples R China;[4]E China Univ Sci & Technol, Adv Mat Lab, Shanghai 200237, Peoples R China;[5]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R 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：;WOS:【SCI-EXPANDED(收录号:WOS:000293419700064)】；

基金：This project was financially supported by NSFC (90406021, 50903028, and 20972043), Science and Technology Bureau of Heilongjiang Province (QC08C10), Supporting Program of Universities' Science and Technology Innovation Team of Education Bureau of Heilongjiang Province (2010td03), Open/Innovation Fund of KLFIMC, Heilongjiang University under Grant 2010hdtd-08, and Heilongjiang University Funds for Distinguished Young Scientists. Helpful discussions with Prof. Chun-Hui Huang, Prof. Lian-Hui Wang, and Prof. Fu-You Li (Fudan University) were highly appreciated.

语种：英文

摘要：Two metallopolymers P1 and P2 were prepared by using a novel polymerizable Eu3+ complex Eu(TTA)(3)VBADPO (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 PI and P2 realized the pure red emissions from Eu3+ ions. The biggest luminance of 1491 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.