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Frontiers of Optoelectronics

ISSN 2095-2759

ISSN 2095-2767(Online)

CN 10-1029/TN

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Front Optoelec Chin    2011, Vol. 4 Issue (1) : 80-86    https://doi.org/10.1007/s12200-011-0209-y
RESEARCH ARTICLE
Effect of deoxycholic acid on performance of dye-sensitized solar cell based on black dye
Quanyou FENG, Hong WANG, Gang ZHOU, Zhong-Sheng WANG()
Department of Chemistry, Laboratory of Advanced Materials, Fudan University, Shanghai 200438, China
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Abstract

The effect of coadsorption with deoxycholic acid (DCA) on the performance of dye-sensitized solar cell (DSSC) based on [(C4H9)4N]3[Ru(Htcterpy)(NCS)3](tcterpy= 4,4′,4″-tricarboxy-2,2′:6′,2″-terpyridine), a so-called black dye, had been investigated. Results showed that the coadsorption of DCA with the black dye results in significant improvement in the photocurrent and mild increase in the photovoltage, which leads to an enhancement of overall power conversion efficiency by 9%. The enhancement of photocurrent was attributed to the increased efficiency of charge collection and/or electron injection. The coadsorption with DCA suppressed charge recombination and thus improved open-circuit photovoltage.
Keywords dye-sensitized solar cell (DSSC)      coadsorption      black dye     
Corresponding Author(s): WANG Zhong-Sheng,Email:zs.wang@fudan.edu.cn   
Issue Date: 05 March 2011
 Cite this article:   
Quanyou FENG,Hong WANG,Gang ZHOU, et al. Effect of deoxycholic acid on performance of dye-sensitized solar cell based on black dye[J]. Front Optoelec Chin, 2011, 4(1): 80-86.
 URL:  
https://academic.hep.com.cn/foe/EN/10.1007/s12200-011-0209-y
https://academic.hep.com.cn/foe/EN/Y2011/V4/I1/80
Fig.1  Molecular structures of black dye (a) and DCA (b). TBA stands for tetrabutylammonium
Fig.1  Molecular structures of black dye (a) and DCA (b). TBA stands for tetrabutylammonium
Fig.2  UV-vis absorption spectra of the black dye in ethanol. (a) Without DCA; (b) with 20 mM DCA
Fig.2  UV-vis absorption spectra of the black dye in ethanol. (a) Without DCA; (b) with 20 mM DCA
Fig.3  UV-vis absorption spectra of TiO films (1.8 μm) exposed to 0.2 mM black dye solution. (a) Without DCA; (b) with 20 mM DCA. The bare TiO film (transparent) was used as a reference for the spectrum scan
Fig.3  UV-vis absorption spectra of TiO films (1.8 μm) exposed to 0.2 mM black dye solution. (a) Without DCA; (b) with 20 mM DCA. The bare TiO film (transparent) was used as a reference for the spectrum scan
Fig.4  Cyclic voltammograms of TiO films after dipping in the following solutions. (a) 0.2 mM black dye; (b) 0.2 mM black dye+ 20 mM DCA
Fig.4  Cyclic voltammograms of TiO films after dipping in the following solutions. (a) 0.2 mM black dye; (b) 0.2 mM black dye+ 20 mM DCA
Fig.5  IPCE action spectra of DSSCs based on (a) black dye; (b) black dye/DCA with scattering films (25 μm)
Fig.5  IPCE action spectra of DSSCs based on (a) black dye; (b) black dye/DCA with scattering films (25 μm)
Fig.6  - curves for DSSCs incorporating (a) black dye; (b) black dye /DCA with scattering films (25 μm)
Fig.6  - curves for DSSCs incorporating (a) black dye; (b) black dye /DCA with scattering films (25 μm)
Jsc/(mA·cm-2)Voc/VFFη/%
black dye17.670.710.718.91
black dye/DCA18.810.730.719.74
Tab.1  Effect of coadsorption of DCA on the photovoltaic performance of the DSSC
Fig.7  Dark current with applied potential for DSSCs based on (a) black dye; (b) black dye/DCA
Fig.7  Dark current with applied potential for DSSCs based on (a) black dye; (b) black dye/DCA
Fig.8  Electrochemical impedance spectra of DSSCs based on (a) black dye; (b) black dye/DCA
Fig.8  Electrochemical impedance spectra of DSSCs based on (a) black dye; (b) black dye/DCA
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