Synthesis and Photovoltaic Performances of Dye-sensitized Solar Cells Based on Novel NIR Dyes Containing Multi-cyano Acceptor

doi:10.7517/j.issn.1674-0475.2010.02.137

Abstract

Abstract: A series of novel NIR dyes 5C-1,5C-2 and 5C-3 containing triphenylamine,dimethylphenylamine and indoline unit as electron donors were synthesized and characterized.Their photophysical and electrochemical properties were studied in detail.All of three dyes have strong absorption in visible and NIR region from 550 to 850 nm.While adsorbed on TiO₂,absorption peaks become broadened with red-shift in their absorption edges,which are favored to capture light in NIR region.However,LUMO levels of these NIR dyes are above-0.1 V vs NHE,incapable of matching the conduction band of TiO₂(-0.5 V vs NHE).Therefore,SnO₂ was utilized as anodic semiconductor materials instead of TiO₂.The short-circuit current density was sharply increased,indicating that using a suitable semiconductor material could improve light-generated current effectively.The photovoltaic performance of DSSCs based on three dyes could be further improved after optimizing the semiconductor materials and the electrolyte.

Key words: NIR, dye-sensitized solar cells, sensitizer, SnO₂

CLC Number:

HE Li, LIU Bo, CHEN Yu, ZHU Wei-hong. Synthesis and Photovoltaic Performances of Dye-sensitized Solar Cells Based on Novel NIR Dyes Containing Multi-cyano Acceptor[J]. Imaging Science and Photochemistry, 2010, 28(2): 137-146.

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