Synthesis of a new class of cyclometallated ruthenium(II) complexes and their application in dye-sensitized solar cells

A new class of cyclometallated ruthenium(II) complexes, Ru(tctpy)(C^N)(NCS) ( 1, 2) where C^N = a bidentate cyclometallating ligand, was synthesized as sensitizers for light, especially in the near-IR region for dye-sensitized solar cells (DSCs). A DSC sensitized with 2 shows a 10% incident photon-t...

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Bibliographic Details
Published in:Inorganic chemistry communications 2009-09, Vol.12 (9), p.842-845
Main Authors: Funaki, Takashi, Yanagida, Masatoshi, Onozawa-Komatsuzaki, Nobuko, Kasuga, Kazuyuki, Kawanishi, Yuji, Kurashige, Mitsuhiko, Sayama, Kazuhiro, Sugihara, Hideki
Format: Article
Language:English
Subjects:
Cyclometallating ligand
Dye-sensitized solar cell
Ruthenium(II) complex
Sensitizer
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Summary:A new class of cyclometallated ruthenium(II) complexes, Ru(tctpy)(C^N)(NCS) ( 1, 2) where C^N = a bidentate cyclometallating ligand, was synthesized as sensitizers for light, especially in the near-IR region for dye-sensitized solar cells (DSCs). A DSC sensitized with 2 shows a 10% incident photon-to-current conversion efficiency (IPCE) at 900 nm. We synthesized a new class of cyclometallated ruthenium(II) complexes, Ru(tctpy)(C^N)(NCS) ( 1, 2), where C^N is a bidentate cyclometallating ligand such as 2-phenylpyridinato or 2-(4-(2-phenylethynyl)phenyl)pyridinato. Although these complexes exist as stereoisomers, the microwave synthetic technique yielded only one isomer. These compounds act as light sensitizers and have excellent light-harvesting properties, especially in the near-IR region. Therefore, they can be used in dye-sensitized solar cells (DSCs). A DSC sensitized with 2 shows a 10% incident photon-to-current conversion efficiency at 900 nm.
ISSN:1387-7003
1879-0259
DOI:10.1016/j.inoche.2009.06.030