Near-Quantitative Internal Quantum Efficiency in a Light-Emitting Electrochemical Cell

被引：161

作者：

Bolink, Henk J. ^{[1
]}

Coronado, Eugenio ^{[1
]}

Costa, Ruben D. ^{[1
]}

Lardies, Nora ^{[1
]}

Orti, Enrique ^{[1
]}

机构：

[1] Univ Valencia, Inst Ciencia Mol, ES-46071 Valencia, Spain

来源：

INORGANIC CHEMISTRY | 2008年 / 47卷 / 20期

关键词：

D O I：

10.1021/ic801587n

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A green-light-emitting iridium(III) complex was prepared that has a photoluminescence quantum yield in a thin-film configuration of almost unity. When used in a simple solid-state single-layer light-emitting electrochemical cell, it yielded an external quantum efficiency of nearly 15% and a power efficiency of 38 Lm/W. We argue that these high external efficiencies are only possible if near-quantitative internal electron-to-photon conversion occurs. This shows that the limiting factor for the efficiency of these devices is the photoluminescence quantum yield in a solid film configuration. The observed efficiencies show the prospect of these simple electroluminescent devices for lighting and signage applications.

引用

页码：9149 / 9151

页数：3

共 18 条

[1] Luminescent and redox-active polynuclear transition metal complexes [J].

Balzani, V ;

Juris, A ;

Venturi, M ;

Campagna, S ;

Serroni, S .

CHEMICAL REVIEWS, 1996, 96 (02) :759-833

[2] Electroluminescence in ruthenium(II) complexes [J].

Bernhard, S ;

Barron, JA ;

Houston, PL ;

Abruña, HD ;

Ruglovksy, JL ;

Gao, XC ;

Malliaras, GG .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (45) :13624-13628

[3] Origin of the large spectral shift in electroluminescence in a blue light emitting cationic iridium(III) complex [J].

Bolink, Henk J. ;

Cappelli, Luca ;

Cheylan, Stephanie ;

Coronado, Eugenio ;

Costa, Ruben D. ;

Lardies, Nora ;

Nazeeruddin, Md. K. ;

Orti, Enrique .

JOURNAL OF MATERIALS CHEMISTRY, 2007, 17 (48) :5032-5041

[4] Controlling phosphorescence color and quantum yields in cationic iridium complexes:: A combined experimental and theoretical study [J].

De Angelis, Filippo ;

Fantacci, Simona ;

Evans, Nicholas ;

Klein, Cedric ;

Zakeeruddin, Shaik M. ;

Moser, Jacques-E. ;

Kalyanasundaram, Kuppuswamy ;

Bolink, Henk J. ;

Gratzel, M. ;

Nazeeruddin, Mohammed K. .

INORGANIC CHEMISTRY, 2007, 46 (15) :5989-6001

[5] Synthesis, characterization, and DFT/TD-DFT calculations of highly phosphorescent blue light-emitting anionic iridium complexes [J].

Di Censo, Davide ;

Fantacci, Simona ;

De Angelis, Filippo ;

Klein, Cedric ;

Evans, Nick ;

Kalyanasundaram, K. ;

Bolink, Henk J. ;

Gratzel, Michael ;

Nazeeruddin, Mohammad K. .

INORGANIC CHEMISTRY, 2008, 47 (03) :980-989

[6] Solid-state light-emitting devices based on the tris-chelated ruthenium(II) complex. 2. Tris(bipyridyl)ruthenium(II) as a high-brightness emitter [J].

Handy, ES ;

Pal, AJ ;

Rubner, MF .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1999, 121 (14) :3525-3528

[7] DUAL EMISSION FROM AN ORTHO-METALATED IR(III) COMPLEX [J].

KING, KA ;

WATTS, RJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1987, 109 (05) :1589-1590

[8] Synthetic control of excited-state properties in cyclometalated Ir(III) complexes using ancillary ligands [J].

Li, J ;

Djurovich, PI ;

Alleyne, BD ;

Yousufuddin, M ;

Ho, NN ;

Thomas, JC ;

Peters, JC ;

Bau, R ;

Thompson, ME .

INORGANIC CHEMISTRY, 2005, 44 (06) :1713-1727

[9] DNA binding geometries of ruthenium(II) complexes with 1,10-phenanthroline and 2,2′-bipyridine ligands studied with linear dichroism spectroscopy.: Borderline cases of intercalation [J].

Lincoln, P ;

Nordén, B .

JOURNAL OF PHYSICAL CHEMISTRY B, 1998, 102 (47) :9583-9594

[10] The roles of injection and mobility in organic light emitting diodes [J].

Malliaras, GG ;

Scott, JC .

JOURNAL OF APPLIED PHYSICS, 1998, 83 (10) :5399-5403

← 1 2 →