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Polymers 2012, 4(3), 1613-1626; doi:10.3390/polym4031613
Article

Dye-sensitized Solar Cells with New One-Dimensional Halide-Bridged Cu(I)–Ni(II) Heterometal Coordination Polymers Containing Hexamethylene Dithiocarbamate Ligand

1,* , 1
, 1
, 2
, 1
 and 1
1 School of Science and Engineering, Kinki University, 3-4-1 Kowakae, Higashi-Osaka-shi, Osaka 577-8502, Japan 2 Department of Materials Science and Engineering, Kitami Institute of Technology, 165 Koen-cho, Kitami, Hokkaido 090-8507, Japan
* Author to whom correspondence should be addressed.
Received: 2 July 2012 / Revised: 5 September 2012 / Accepted: 10 September 2012 / Published: 20 September 2012
(This article belongs to the Special Issue Polymers for Fuel Cells & Solar Energy)
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Abstract

One-dimensional (1D) halide-bridged Cu(I)–Ni(II) heterometal coordination polymers containing a hexamethylene dithiocarbamate (Hm-dtc) ligand have been synthesized and crystallographically characterized. The highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) levels of the coordination polymers were estimated using UV-Vis-NIR and photoelectron spectroscopies, and it was revealed that these coordination polymers have appropriate HOMO levels for use as dye sensitizers. Direct-current electrical conductivity measurements and impedance measurements indicated that these 1D Cu(I)–Ni(II) heterometal coordination polymers were insulators (σ300K < 10−12 S cm−1). In addition, the coordination polymers were used as sensitizing materials in dye-sensitized solar cells (DSSCs). DSSCs with 1D Cu(I)–Ni(II) heterometal coordination polymers showed lower performances than those with 1D halide-bridged Cu(I)–Cu(II) mixed-valence coordination polymers.
Keywords: coordination polymer; crystal structure; electric-conductivity; dye-sensitized solar cell coordination polymer; crystal structure; electric-conductivity; dye-sensitized solar cell
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Okubo, T.; Tanaka, N.; Anma, H.; Kim, K.H.; Maekawa, M.; Kuroda-Sowa, T. Dye-sensitized Solar Cells with New One-Dimensional Halide-Bridged Cu(I)–Ni(II) Heterometal Coordination Polymers Containing Hexamethylene Dithiocarbamate Ligand. Polymers 2012, 4, 1613-1626.

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