High‐Efficiency and Stable Mesoscopic Dye‐Sensitized Solar Cells Based on a High Molar Extinction Coefficient Ruthenium Sensitizer and Nonvolatile Electrolyte

Abstract

Mesoscopic dye-sensitized solar cells (DSCs) with efficiency greater than 10.5 % are reported. Using a newly designed sensitizer (K77, see figure) combined with a newly formulated nonvolatile organic-solvent-based electrolyte (Z646), highly efficient DSCs (up to 9.5 %) that exhibit unprecedented long-term stability (1000 h) under both light-soaking and thermal stress are demonstrated.