Photovoltage improvements and recombination suppression by montmorillonite addition to PEO gel electrolyte for dye-sensitized solar cells
文献情報
Yi Geng, Yantao Shi, Liduo Wang, Beibei Ma, Rui Gao, Yifeng Zhu, Haopeng Dong, Yong Qiu
Montmorillonite (MMT) added to electrolytes has been reported in the literature to facilitate the transport of Iā/I3ā, and improve the ionic conductivity and consequent photocurrent of dye-sensitized solar cells (DSCs). This paper firstly observes, investigates and reports that MMT addition to a poly(ethylene oxide) (PEO)-based gel electrolyte not only improves the ionic conductivity of the gel electrolyte, but also increases the photovoltage and decreases the dark current. From the results of electrochemical impedance spectroscopy (EIS) and transient photovoltage spectra, we evidence that MMT in the polymer gel electrolyte can efficiently retard the charge recombination that occurs at the TiO2/dye/electrolyte interfaces.
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