A Thermostable and Long‐Term‐Stable Ionic‐Liquid‐Based Gel Electrolyte for Efficient Dye‐Sensitized Solar Cells

Binary ionic liquids are used to prepare two thermostable and highly conductive gel electrolytes (A and B). Quasi-solid-state dye-sensitized solar cells using these electrolytes show high power conversion efficiencies of up to 5.8 % at 20 °C and work well over a wide temperature range (20–80 °C), as shown by plots of photocurrent density versus voltage (see picture), and remain in the gel state even at 80 °C (inset).