Near-UV to red-emitting charged bis-cyclometallated iridium(iii) complexes for light-emitting electrochemical cells

Florian Kessler, Rubén D. Costa, Davide Di Censo, Rosario Scopelliti, Enrique Ortí*, Henk J. Bolink, Sebastian Meier, Wiebke Sarfert, Michael Grätzel, Md Khaja Nazeeruddin, Etienne Baranoff

*この研究の対応する著者

研究成果: Article査読

108 被引用数 (Scopus)

抄録

Herein we report a series of charged iridium complexes emitting from near-UV to red using carbene-based NC: ancillary ligands. Synthesis, photophysical and electrochemical properties of this series are described in detail together with X-ray crystal structures. Density Functional Theory calculations show that the emission originates from the cyclometallated main ligand, in contrast to commonly designed charged complexes using bidentate NN ancillary ligands, where the emission originates from the ancillary NN ligand. The radiative process of this series of compounds is characterized by relatively low photoluminescence quantum yields in solution that is ascribed to non-radiative deactivation of the excited state by thermally accessible metal-centered states. Despite the poor photophysical properties of this series of complexes in solution, electroluminescent emission from the bluish-green to orange region of the visible spectrum is obtained when they are used as active compounds in light-emitting electrochemical cells.

本文言語English
ページ(範囲)180-191
ページ数12
ジャーナルDalton Transactions
41
1
DOI
出版ステータスPublished - 2012 1 7
外部発表はい

ASJC Scopus subject areas

  • 無機化学

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