Co-existence of LiI and KI in filler-free, quasi-solid-state electrolyte for efficient and stable dye-sensitized solar cell
2010; Elsevier BV; Volume: 196; Issue: 3 Linguagem: Inglês
10.1016/j.jpowsour.2010.08.095
ISSN1873-2755
AutoresShweta Agarwala, L. N. S. A. Thummalakunta, Charlene Cook, Connor Kang Nuo Peh, Alvin Wong, Lin Ke, Ghim Wei Ho,
Tópico(s)Perovskite Materials and Applications
ResumoA quasi-solid-state electrolyte employing a poly (ethylene oxide)/LiI system without a filler is evaluated. The electrolyte is optimized for various potassium iodide (KI) concentrations. The electrolyte containing 14.5 wt.% KI exhibits the highest conductivity (3.0 × 10−3 S cm−1). An efficiency of 4.5% is achieved using this composition of the electrolyte. It is shown that the introduction of KI in a conventional PEO/I2/LiI electrolyte system prevents the crystallization of the polymer matrix and enhances the ionic conductivity. The energy conversion efficiency of the device is further enhanced to 5.8% by incorporating a light-scattering layer.
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