Recent Progress in Non-Platinum Counter Electrode Materials for Dye-Sensitized Solar Cells Jayaraman Theerthagiri, [a] Arumugam Raja Senthil, [a] Jagannathan Madhavan,* [a] and Thandavarayan Maiyalagan [b] ChemElectroChem 2015, 2, 928 – 945 # 2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim 928 Reviews DOI: 10.1002/celc.201402406