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SOLAR ENERGY R&D IN ASIA TECHNICAL BRIEFS

Dye-Sensitized Solar Cells Consisting of 3D-Electrodes—A Review: Aiming at High Efficiency From the View Point of Light Harvesting and Charge Collection

[+] Author and Article Information
Kenshiro Uzaki, Terumi Nishimura, Jun Usagawa, Shuzi Hayase

 Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsuku, Kitakyushu 808-0196, Japan

Mitsuru Kono, Yoshihiro Yamaguchi

 Nippon Steel Chemical Co. Ltd., 46-80, Oaza-Nakabaru Sakinohama, Tobata-ku, Kitakyushu 804-8503, Japan

J. Sol. Energy Eng 132(2), 021204 (May 17, 2010) (7 pages) doi:10.1115/1.4001182 History: Received January 04, 2009; Revised November 17, 2009; Published May 17, 2010; Online May 17, 2010

Directions to high efficiency dye-sensitized solar cells (DSCs) are reviewed in terms of light harvesting and charge collection. Three dimensional DSCs characterized by a double dye layer electrode, a floating electrode, and a fiber type electrode are proposed. The potentiality of each structure was discussed by using each model cell. Transparent conductive layerless electrodes were the key structures in these cells. Fabrication processes and fundamental performances are reported. Finally, it is concluded that dyes having high photoconversion efficiency in the near IR and IR regions are essential for realizing these tandem and hybrid cells.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Photoconversion efficiency for DSCs—present stage

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Figure 2

Expected Jsc and solar cell efficiency from solar cell spectrum

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Figure 3

Example of hybrid cells (27): (A) black dye and (B) N3 dye

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Figure 4

Example of tandem cells (30): (B) N3 and (A) Erythrosin B

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Figure 5

A model cell for a double dye layer structure (31): (B) NK3705 and (B) black dye

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Figure 6

IPCE curves for a double dye layer cell and the corresponding single cell stained by each dye (31). Experimental conditions: see Fig. 7.

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Figure 7

Photovoltaic performances for a double dye layer cell and the corresponding single cell stained by each dye (31). Electrolyte: LiI: 500 mM, TBP: 580 mM, I2: 50 mM, EMImDCA: 600 mM in acetonitrile, and 0.25 cm2 cell. AM 1.5, masked. The active area was corrected by a photograph.

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Figure 8

Tandem cell structure consisting of a floating electrode

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Figure 9

Model dye structures used to prove tandem potentiality

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Figure 10

IPCE curves of a floating electrode type tandem cell and single cells. Electrolyte: see Fig. 7.

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Figure 11

Model cell for aiming at fiber type dye-sensitized solar cells and concept for absorbing full spectra light (41)

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Figure 12

Flat TCO-less DSC structure, which develops to fiber type dye-sensitized solar cells (38)

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Figure 13

Fiber type dye-sensitized solar cells having a tandem structure (38)

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Figure 14

IPCE curves for fiber type dye-sensitized solar cells having a tandem structure and single cells (41). Electrolyte: see Fig. 7.

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