A deep-blue emitting charged bis-cyclometallated iridium(III) complex for light-emitting electrochemical cells

被引：77

作者：

Meier, Sebastian B. ^{[1
,2
]}

Sarfert, Wiebke ^{[2
]}

Junquera-Hernandez, Jose M. ^{[3
]}

Delgado, Manuel ^{[3
]}

Tordera, Daniel ^{[3
]}

Orti, Enrique ^{[3
]}

Bolink, Henk J. ^{[3
]}

Kessler, Florian ^{[4
]}

Scopelliti, Rosario ^{[4
]}

Graetzel, Michael ^{[4
]}

Nazeeruddin, M. Khaja ^{[4
]}

Baranoff, Etienne ^{[4
,5
]}

机构：

[1] Univ Erlangen Nurnberg, Dept Mat Sci Mat Elect & Energy Technol 4, DE-91058 Erlangen, Germany

[2] Siemens AG, CT RTC MAT MPV DE, Corp Technol, DE-91058 Erlangen, Germany

[3] Univ Valencia, Inst Ciencia Mol, ES-46980 Paterna, Spain

[4] Swiss Fed Inst Technol EPFL, Sch Basic Sci, Inst Chem Sci & Engn, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland

[5] Univ Birmingham, Sch Chem, Birmingham B15 2TT, W Midlands, England

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2013年 / 1卷 / 01期

关键词：

FUNCTIONAL RESPONSE THEORY; TURN-ON TIMES; ELECTROLUMINESCENT DEVICES; EXCITATION-ENERGIES; EFFICIENT BLUE; SINGLE-LAYER; GREEN; PHOSPHORESCENCE; DENDRIMERS; SPECTRA;

D O I：

10.1039/c2tc00251e

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report here a new cationic bis-cyclometallated iridium(III) complex, 1, with deep-blue emission at 440 nm and its use in Light-emitting Electrochemical Cells (LECs). The design is based on the 2',6'-difluoro-2,3'-bipyridine skeleton as the cyclometallating ligand and a bis-imidazolium carbene-type ancillary ligand. Furthermore, bulky tert-butyl substituents are used to limit the intermolecular interactions. LECs have been driven both at constant voltage (6 V) and constant current (2.5 mA cm(-2)). The performances are significantly improved with the latter method, resulting overall in one of the best reported greenish-blue LECs having fast response (17 s), light intensity over 100 cd m(-2) and a reasonable efficiency of almost 5 cd A(-1).

引用

页码：58 / 68

页数：11

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