Khan, Sher BahadarYadav, Pankaj KumarDecoppet, Jean-DavidYi, ChenyiAl-Ghamdi, Mohammed S. A.Alhogbi, Basma G.Asiri, Abdullah M.Zakeeruddin, Shaik M.Graetzel, Michael2020-05-072020-05-072020-05-072020-04-2410.1002/ente.202000092https://infoscience.epfl.ch/handle/20.500.14299/168616WOS:000527986900001Herein, green porphyrin sensitizer Y350-based dye-sensitized solar cells (DSCs) with binary ionic liquid-based electrolytes are studied, which are a mixture of 1-methyl-3-propyl-imidazolium iodide and 1-methyl-1-butylpyrrolidinium bis(trifluromethylsulfonyl) -imide, 1-butylpyridinium bis(trifluromethylsulfonyl)imide, 1-methyl-3-ethylimidazolium bis(trifluromethylsulfonyl)imide, or 1-methyl-3-ethylimidazolium tetracyanoborate. The best semitransparent green DSC device exhibits a short-circuit photocurrent density of 9.1 mA cm(-2), an open-circuit photovoltage of 727 mV, and a fill factor of 70%, corresponding to an overall power conversion efficiency (PCE) of 4.9% under standard AM 1.5G illuminations at 100 mW cm(-2). The PCE increases to 6.1% with opaque films containing larger light-scattering TiO2 particles.Energy & FuelsEnergy & Fuelsdye-sensitized solar cellsionic liquid electrolytesorganic dyesphotovoltaicsporphyrin dyeshigh-efficiencytext::journal::journal article::research article