Dye-sensitized solar cells based on nanocrystalline TiO2 sensitized with a novel pyridylquinoline ruthenium(II) complex

Masatoshi Yanagida; Ashraful Islam; Yasuhiro Tachibana; Gaku Fujihashi; Ryuzi Katoh; Hideki Sugihara; Hironori Arakawa

doi:10.1039/B202975H

Dye-sensitized solar cells based on nanocrystalline TiO₂ sensitized with a novel pyridylquinoline ruthenium(ii) complex

Masatoshi Yanagida,^a Ashraful Islam,^a Yasuhiro Tachibana,^a Gaku Fujihashi,^b Ryuzi Katoh,^a Hideki Sugihara*^a and Hironori Arakawa*^a

Author affiliations

* Corresponding authors

^a Photoreaction Control Research Center, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, AIST-Tsukuba Central 5, Tsukuba, Ibaraki, Japan
E-mail: sugihara-hideki@aist.go.jp
Fax: +81 298 61 6771
Tel: +81 298 61 4641

^b Sumitomo Osaka Cement Co. Ltd., 585 Toyotomi, Funabashi, Chiba, Japan

Abstract

[NBu₄]_2n[cis-Ru(H_2−ndcpq)₂(NCS)₂] {n = 0 or 1; H₂dcpq = 4-carboxy-2-[2′-(4′-carboxypyridyl)]quinoline} were newly synthesized, and their photophysical and photovoltaic properties were characterized and compared with those of [NBu₄]_2n[cis-Ru(H_2−ndcbiq)₂(NCS)₂] (H₂dcbiq = 4,4′-dicarboxy-2,2′-biquinoline) and [NBu₄]_2n[cis-Ru(H_2−ndcbpy)₂(NCS)₂] (H₂dcbpy = 4,4′-dicarboxy-2,2′-bipyridine). The lowest excited-state oxidation potential of cis-[Ru(H₂dcpq)₂(NCS)₂] was estimated to be −0.72 V vs. SCE, which was more positive than that of cis-[Ru(H₂dcbpy)₂(NCS)₂], and very close to reported values of the conduction band edge of TiO₂. [NBu₄]_2n[cis-Ru(H_2−ndcpq)₂(NCS)₂] achieved efficient sensitization of nanocrystalline TiO₂ films over a wide visible and near-infrared wavelength range, generating a large short-circuit photocurrent of 13.2 mA cm⁻² and an open-circuit voltage of 0.53 V with a solar energy conversion efficiency of 5.0% under simulated AM 1.5 solar irradiation (100 mW cm⁻²).

Article information

https://doi.org/10.1039/B202975H

Article type

Letter

Submitted

25 Mar 2002

Accepted

30 May 2002

First published

01 Jul 2002

Download Citation

New J. Chem., 2002,26, 963-965

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Dye-sensitized solar cells based on nanocrystalline TiO₂ sensitized with a novel pyridylquinoline ruthenium(II) complex

M. Yanagida, A. Islam, Y. Tachibana, G. Fujihashi, R. Katoh, H. Sugihara and H. Arakawa, New J. Chem., 2002, 26, 963 DOI: 10.1039/B202975H

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