High stability light-emitting electrochemical cells from cationic iridium complexes with bulky 5,5 ' substituents

Liangfeng Sun; Armand Galan; Sebastien Ladouceur; Jason D. Slinker; Eli Zysman-Colman

doi:10.1039/c1jm12984h

High stability light-emitting electrochemical cells from cationic iridium complexes with bulky 5,5 ' substituents

Liangfeng Sun, Armand Galan, Sebastien Ladouceur, Jason D. Slinker^*, Eli Zysman-Colman

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We explore the photophysical, electrochemical, and electroluminescent properties of the ionic transition metal complex [(ppy)(2)Ir(bpy*)](PF(6)) where ppyH is 2-phenylpyridine and bpy* is 5,5'-diaryl-2,2'-bipyridine. Single layer devices of the structure ITO/[(ppy)(2)Ir(bpy*)](PF(6))/Au exhibited high stability, with half-lives on the order of 100 h at a bias of -4 V. Long lifetimes are achieved through the bulky nature of the aryl substituents, which serves to limit chromophore-chromophore self-quenching, and 5,5' positioning of these bulky groups is clearly advantageous for device performance.

Original language	English
Pages (from-to)	18083-18088
Number of pages	6
Journal	Journal of Materials Chemistry
Volume	21
Issue number	44
DOIs	https://doi.org/10.1039/c1jm12984h
Publication status	Published - 2011

Keywords

TRANSITION-METAL-COMPLEXES
ELECTROLUMINESCENT DEVICES
PHOTOPHYSICAL PROPERTIES
QUANTUM YIELDS
SINGLE-LAYER
EFFICIENT
GREEN
HEXAFLUOROPHOSPHATE
REDUCTION
REDOX

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10.1039/c1jm12984h

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@article{7126ef8739904bf58b67fb8c05859018,

title = "High stability light-emitting electrochemical cells from cationic iridium complexes with bulky 5,5 ' substituents",

abstract = "We explore the photophysical, electrochemical, and electroluminescent properties of the ionic transition metal complex [(ppy)(2)Ir(bpy*)](PF(6)) where ppyH is 2-phenylpyridine and bpy* is 5,5'-diaryl-2,2'-bipyridine. Single layer devices of the structure ITO/[(ppy)(2)Ir(bpy*)](PF(6))/Au exhibited high stability, with half-lives on the order of 100 h at a bias of -4 V. Long lifetimes are achieved through the bulky nature of the aryl substituents, which serves to limit chromophore-chromophore self-quenching, and 5,5' positioning of these bulky groups is clearly advantageous for device performance.",

keywords = "TRANSITION-METAL-COMPLEXES, ELECTROLUMINESCENT DEVICES, PHOTOPHYSICAL PROPERTIES, QUANTUM YIELDS, SINGLE-LAYER, EFFICIENT, GREEN, HEXAFLUOROPHOSPHATE, REDUCTION, REDOX",

author = "Liangfeng Sun and Armand Galan and Sebastien Ladouceur and Slinker, {Jason D.} and Eli Zysman-Colman",

year = "2011",

doi = "10.1039/c1jm12984h",

language = "English",

volume = "21",

pages = "18083--18088",

journal = "Journal of Materials Chemistry",

issn = "0959-9428",

publisher = "Royal Society of Chemistry",

number = "44",

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TY - JOUR

T1 - High stability light-emitting electrochemical cells from cationic iridium complexes with bulky 5,5 ' substituents

AU - Sun, Liangfeng

AU - Galan, Armand

AU - Ladouceur, Sebastien

AU - Slinker, Jason D.

AU - Zysman-Colman, Eli

PY - 2011

Y1 - 2011

N2 - We explore the photophysical, electrochemical, and electroluminescent properties of the ionic transition metal complex [(ppy)(2)Ir(bpy*)](PF(6)) where ppyH is 2-phenylpyridine and bpy* is 5,5'-diaryl-2,2'-bipyridine. Single layer devices of the structure ITO/[(ppy)(2)Ir(bpy*)](PF(6))/Au exhibited high stability, with half-lives on the order of 100 h at a bias of -4 V. Long lifetimes are achieved through the bulky nature of the aryl substituents, which serves to limit chromophore-chromophore self-quenching, and 5,5' positioning of these bulky groups is clearly advantageous for device performance.

AB - We explore the photophysical, electrochemical, and electroluminescent properties of the ionic transition metal complex [(ppy)(2)Ir(bpy*)](PF(6)) where ppyH is 2-phenylpyridine and bpy* is 5,5'-diaryl-2,2'-bipyridine. Single layer devices of the structure ITO/[(ppy)(2)Ir(bpy*)](PF(6))/Au exhibited high stability, with half-lives on the order of 100 h at a bias of -4 V. Long lifetimes are achieved through the bulky nature of the aryl substituents, which serves to limit chromophore-chromophore self-quenching, and 5,5' positioning of these bulky groups is clearly advantageous for device performance.

KW - TRANSITION-METAL-COMPLEXES

KW - ELECTROLUMINESCENT DEVICES

KW - PHOTOPHYSICAL PROPERTIES

KW - QUANTUM YIELDS

KW - SINGLE-LAYER

KW - EFFICIENT

KW - GREEN

KW - HEXAFLUOROPHOSPHATE

KW - REDUCTION

KW - REDOX

U2 - 10.1039/c1jm12984h

DO - 10.1039/c1jm12984h

M3 - Article

SN - 0959-9428

VL - 21

SP - 18083

EP - 18088

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

IS - 44

ER -

High stability light-emitting electrochemical cells from cationic iridium complexes with bulky 5,5 ' substituents

Abstract

Keywords

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