title: Novel red phosphorescent polymers bearing both ambipolar and functionalized Ir(III) phosphorescent moieties for highly efficient organic light-emitting diodes.
abstract: A series of novel red phosphorescent polymers is successfully developed through Suzuki cross-coupling among ambipolar units, functionalized Ir(III) phosphorescent blocks, and fluorene-based silane moieties. The photophysical and electrochemical investigations indicate not only highly efficient energy-transfer from the organic segments to the phosphorescent units in the polymer backbone but also the ambipolar character of the copolymers. Benefiting from all these merits, the phosphorescent polymers can furnish organic light-emitting diodes (OLEDs) with exceptional high electroluminescent (EL) efficiencies with a current efficiency (η L ) of 8.31 cd A(-1) , external quantum efficiency (η ext ) of 16.07%, and power efficiency (η P ) of 2.95 lm W(-1) , representing the state-of-the-art electroluminescent performances ever achieved by red phosphorescent polymers. This work here might represent a new pathway to design and synthesize highly efficient phosphorescent polymers.
authors.affiliation: MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Institute of Chemistry for New Energy Material, Department of Chemistry, Faculty of Science, Xi'an Jiaotong University, Xi'an, 710049, China.
authors.forename: Jiang
authors.initials: J
authors.lastname: Zhao
authors.forename: Meng
authors.initials: M
authors.lastname: Lian
authors.forename: Yue
authors.initials: Y
authors.lastname: Yu
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Yan
authors.forename: Xianbin
authors.initials: X
authors.lastname: Xu
authors.forename: Xiaolong
authors.initials: X
authors.lastname: Yang
authors.forename: Guijiang
authors.initials: G
authors.lastname: Zhou
authors.forename: Zhaoxin
authors.initials: Z
authors.lastname: Wu
mesh_terms: D004735:Energy Transfer; D005449:Fluorenes / Q000737:chemistry*; D007495:Iridium; D008027:Light; D049408:Luminescent Agents / Q000737:chemistry*; D055668:Photochemical Processes; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry
chemical_list: D005449:Fluorenes; D049408:Luminescent Agents; D011108:Polymers; D012821:Silanes; D007495:Iridium
keywords: ambipolar; aromatic silanes; functional IrIII complexes; organic light-emitting diodes (OLEDs); phosphorescent polymers