Formylated chloro-bridged iridium(III) dimers as OLED materials: opening up new possibilities

Michael Y.  Wong; Guohua Xie; Clarisse Tourbillon; Martina  Sandroni; David Bradford Cordes; Alexandra Martha Zoya Slawin; Ifor David William Samuel; Eli Zysman-Colman

doi:10.1039/C4DT03127J

Formylated chloro-bridged iridium(III) dimers as OLED materials: opening up new possibilities

Michael Y. Wong, Guohua Xie, Clarisse Tourbillon, Martina Sandroni, David Bradford Cordes, Alexandra Martha Zoya Slawin, Ifor David William Samuel, Eli Zysman-Colman

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Abstract

In this study, a series of four formyl-substituted chloro-bridged iridium(III) dimers were prepared. Their absorption, photophysical and electrochemical properties were studied in dichloromethane solution. It was found that as the formyl content increased on the cyclometalating ligands, emission unexpectedly became brighter. Organic light-emitting diodes (OLEDs) were fabricated using each of these iridium dimers as the emitter. The OLED fabricated using the brightest of the series, 2b, as the dopant afforded a decent external quantum efficiency (EQE) of 2.6%. This suggests that chloro-bridged iridium dimers are potential candidates as solid-state emitters.

Original language	English
Journal	Dalton Transactions
Volume	44
Issue number	18
Early online date	8 Jan 2015
DOIs	https://doi.org/10.1039/C4DT03127J
Publication status	Published - 14 May 2015

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10.1039/C4DT03127J

Cordes_2015_DT_Formylated_CC
Copyright the Authors 2015. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (http://creativecommons.org/licenses/by/3.0/)
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title = "Formylated chloro-bridged iridium(III) dimers as OLED materials: opening up new possibilities",

abstract = "In this study, a series of four formyl-substituted chloro-bridged iridium(III) dimers were prepared. Their absorption, photophysical and electrochemical properties were studied in dichloromethane solution. It was found that as the formyl content increased on the cyclometalating ligands, emission unexpectedly became brighter. Organic light-emitting diodes (OLEDs) were fabricated using each of these iridium dimers as the emitter. The OLED fabricated using the brightest of the series, 2b, as the dopant afforded a decent external quantum efficiency (EQE) of 2.6%. This suggests that chloro-bridged iridium dimers are potential candidates as solid-state emitters.",

author = "Wong, {Michael Y.} and Guohua Xie and Clarisse Tourbillon and Martina Sandroni and Cordes, {David Bradford} and Slawin, {Alexandra Martha Zoya} and Samuel, {Ifor David William} and Eli Zysman-Colman",

note = "Date of Acceptance: 17/10/2014",

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doi = "10.1039/C4DT03127J",

language = "English",

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TY - JOUR

T1 - Formylated chloro-bridged iridium(III) dimers as OLED materials

T2 - opening up new possibilities

AU - Wong, Michael Y.

AU - Xie, Guohua

AU - Tourbillon, Clarisse

AU - Sandroni, Martina

AU - Cordes, David Bradford

AU - Slawin, Alexandra Martha Zoya

AU - Samuel, Ifor David William

AU - Zysman-Colman, Eli

N1 - Date of Acceptance: 17/10/2014

PY - 2015/5/14

Y1 - 2015/5/14

N2 - In this study, a series of four formyl-substituted chloro-bridged iridium(III) dimers were prepared. Their absorption, photophysical and electrochemical properties were studied in dichloromethane solution. It was found that as the formyl content increased on the cyclometalating ligands, emission unexpectedly became brighter. Organic light-emitting diodes (OLEDs) were fabricated using each of these iridium dimers as the emitter. The OLED fabricated using the brightest of the series, 2b, as the dopant afforded a decent external quantum efficiency (EQE) of 2.6%. This suggests that chloro-bridged iridium dimers are potential candidates as solid-state emitters.

AB - In this study, a series of four formyl-substituted chloro-bridged iridium(III) dimers were prepared. Their absorption, photophysical and electrochemical properties were studied in dichloromethane solution. It was found that as the formyl content increased on the cyclometalating ligands, emission unexpectedly became brighter. Organic light-emitting diodes (OLEDs) were fabricated using each of these iridium dimers as the emitter. The OLED fabricated using the brightest of the series, 2b, as the dopant afforded a decent external quantum efficiency (EQE) of 2.6%. This suggests that chloro-bridged iridium dimers are potential candidates as solid-state emitters.

UR - http://www.rsc.org/suppdata/dt/c4/c4dt03127j/c4dt03127j1.pdf

U2 - 10.1039/C4DT03127J

DO - 10.1039/C4DT03127J

M3 - Article

SN - 1477-9226

VL - 44

JO - Dalton Transactions

JF - Dalton Transactions

IS - 18

ER -

Formylated chloro-bridged iridium(III) dimers as OLED materials: opening up new possibilities

Abstract

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