Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 93, Issue 6-7, Pages 831-835Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2008.09.038
Keywords
Dye-sensitized solar cell; Infrared dyes; TiO2 photoelectrode; Light-confining effect; Co-adsorbate
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The performances of infrared-dye-sensitized solar cells fabricated using two novel cyanine dyes (light absorption edge: 900 nm) were investigated. The performance of the cell using NK6037 dye was superior to that using NK4432; hence, an intimate interaction between the dye and the TiO2 photoelectrode via the functional group is essential for efficient electron injection. The efficiency reached 1.9% by optimizing the light-confining effect of the TiO2 photoelectrode and TiO2 film thickness, and reached 2.3% by adjusting the concentration of deoxycholic acid (DCA) in the dye solution. The roles of the dye and DCA were clarified by photochemical and electrochemical characterization. (C) 2008 Elsevier B.V. All rights reserved.
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