Polyvinyl pyrrolidone aided preparation of TiO sub(2) films used in flexible dye-sensitized solar cells

Polyvinyl pyrrolidone (PVP) is introduced to low temperature preparation of a good quality TiO sub(2) film used in flexible dye-sensitized solar cells (DSSCs). The samples are characterized by scanning electron microscopy and UV-vis absorption spectra, the photovoltaic performance of the DSSC is mea...

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Bibliographic Details
Published in:Electrochimica acta 2011-08, Vol.56 (21), p.7256-7260
Main Authors: Cheng, Cunxi, Wu, Jihuai, Xiao, Yaoming, Chen, Yuan, Fan, Leqing, Huang, Miaoliang, Ling, Jianming, Wang, Jiangli, Tang, Ziying, Yue, Gengtian
Format: Article
Language:English
Subjects:
Adhesion
Dyes
Energy conversion efficiency
Irradiation
Photovoltaic cells
Solar cells
Surface chemistry
Titanium dioxide
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Summary:Polyvinyl pyrrolidone (PVP) is introduced to low temperature preparation of a good quality TiO sub(2) film used in flexible dye-sensitized solar cells (DSSCs). The samples are characterized by scanning electron microscopy and UV-vis absorption spectra, the photovoltaic performance of the DSSC is measured. It is found that PVP can improve the dispersion of TiO sub(2) particles and the adherence of TiO sub(2) particles to flexible substrate, as well as the adsorption of sensitized dye to TiO sub(2) film. Additionally, ultraviolet light irradiation can eliminate organics remained on the surface the TiO sub(2) film and improve the surface state of TiO sub(2) film. Under an optimal condition, a flexible DSSC using TiO sub(2) film doped PVP and UV irradiation treated achieves a light-to-electric energy conversion efficiency of 3.02% under irradiation with a simulate solar light intensity of 100 mW cm super(-2).
ISSN:0013-4686
DOI:10.1016/j.electacta.2011.06.057