Jump to main content
Jump to site search

Issue 38, 2010
Previous Article Next Article

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

Author affiliations

Abstract

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.

Graphical abstract: An inconvenient influence of iridium(iii) isomer on OLED efficiency

Back to tab navigation

Supplementary files

Publication details

The article was received on 03 May 2010, accepted on 05 Jul 2010 and first published on 13 Aug 2010


Article type: Paper
DOI: 10.1039/C0DT00414F
Citation: Dalton Trans., 2010,39, 8914-8918
  •   Request permissions

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

    E. Baranoff, H. J. Bolink, F. De Angelis, S. Fantacci, D. Di Censo, K. Djellab, M. Grätzel and Md. K. Nazeeruddin, Dalton Trans., 2010, 39, 8914
    DOI: 10.1039/C0DT00414F

Search articles by author

Spotlight

Advertisements