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Sublimation not an innocent technique: a case of bis-cyclometalated iridium emitter for OLED. | LitMetric
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Sublimation not an innocent technique: a case of bis-cyclometalated iridium emitter for OLED.

Etienne Baranoff Stéphane Suàrez Philippe Bugnon Claudia Barolo Roberto Buscaino Rosario Scopelliti Libero Zuppiroli Michael Graetzel Md K Nazeeruddin

Inorg Chem

Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland.

Published: August 2008

Isomerization of a neutral bis-cyclometalated iridium(III) complex has been observed for the first time during the preparation of vacuum-processed organic light-emitting devices (OLEDs) and reproduced in solution. Isolation of the isomer revealed a cis organization of the two pyridine rings of the cyclometalating ligands. Photophysical studies show very similar emission properties of the two isomers. However, due to in situ isomerization, it is only possible to prepare vacuum-processed OLED devices having a mixture of isomers.

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 Source
http://dx.doi.org/10.1021/ic800747tDOI Listing

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