An inconvenient influence of iridium(III) isomer on OLED efficiency

被引：34

作者：

Baranoff, Etienne ^{[1
]}

Bolink, Henk J. ^{[3
]}

De Angelis, Filippo ^{[4
]}

Fantacci, Simona ^{[4
,5
]}

Di Censo, Davide ^{[1
]}

Djellab, Karim ^{[2
]}

Graetzel, Michael ^{[1
]}

Nazeeruddin, Md. Khaja ^{[1
]}

机构：

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

[2] Univ Picardie Jules Verne, F-80039 Amiens, France

[3] Univ Valencia, Inst Ciencia Mol, Valencia, Spain

[4] Univ Perugia, Dipartimento Chim, Ist CNR Sci & Tecnol Mol, ISTM CNR, I-06123 Perugia, Italy

[5] Italian Inst Technol IIT, Ctr Biomol Nanotechnol, I-73010 Lecce, Italy

来源：

DALTON TRANSACTIONS | 2010年 / 39卷 / 38期

关键词：

LIGHT-EMITTING-DIODES; PHOSPHORESCENT OLEDS; BIPOLAR HOST; COMPLEXES; DEVICES; GREEN; CONVERSION; TRANSPORT; INJECTION;

D O I：

10.1039/c0dt00414f

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The recently reported heteroleptic cyclometallated iridium(III) complex [Ir(2-phenylpyridine)(2)(2-carboxy-4-dimethylaminopyridine)] N984 and its isomer N984b have been studied more in detail. While photo- and electrochemical properties are very similar, DFT/TDDFT calculations show that the two isomers have different HOMO orbital characteristics. As a consequence, solution processed OLEDs made using a mixture of N984 and isomer N984b similar to vacuum processed devices show that the isomer has a dramatic detrimental effect on the performances of the device. In addition, commonly used thermogravimetric analysis is not suitable for showing the isomerization process. The isomer could impact performances of vacuum processed OLEDs using heteroleptic cyclometallated iridium(III) complexes as dopant.

引用

页码：8914 / 8918

页数：5

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