Chapter 1 Electro-catalysts for Dye-sensitized Solar Cells -an Overview\nPART I COUNTER ELECTRODE CATALYSTS FOR I-MEDIATED DYE-SENSITIZED SOLAR CELLS\nChapter 2 Pt\nChapter 3 Metal and Alloy\nChapter 7 Transition Metal Compounds including TMCs/TMCs nanohybrids\nChapter 4 Carbon Materials including Carbon/Carbon nanohybrids\nChapter 5 Carbon Nanotubes\nChapter 6 Graphene\nChapter 8 Conductive Polymers including Polymers/polymers nanohybrids\nChapter 14 Polycomponent materials\nPART II COMPOSITES AS COUNTER ELECTRODE CATALYSTS FOR I-MEDIATED DYE-SENSITIZED SOLAR CELLS\nChapter 9 Pt-loaded Composites\nChapter 10 TMCs/Carbon Composites\nChapter 11 TMCs/Polymers Composites\nChapter 12 Carbon/Polymers Composites\nChapter 13 Carbon/TMCs/Polymers Composites\nPART III COUNTER ELECTRODE CATALYSTS FOR SPECIAL TYPES OF DYE-SENSITIZED SOLAR CELLS\nChapter 15 Counter Electrode Catalysts for Co-mediated Dye-sensitized Solar Cells\nChapter 16 Counter Electrode Catalysts for T-mediated Dye-sensitized Solar Cells\nChapter 17 Counter Electrode Catalysts for Cu-mediated Dye-sensitized Solar Cells\nChapter 18 Counter Electrode Catalysts for Solid state Dye-sensitized Solar Cells\nChapter 19 Metal-based Counter Electrode Catalysts for Perovskite Solar Cells\nChapter 20 Carbon-based Counter electrode Catalysts for Perovskite Solar Cells\nPART IV STABILITIES AND CALCULATIONS\nChapter 21 Stability Assessment for Dye-sensitized Solar Cells\nChapter 22 First-principles Density Functional Theory and ab initio Car-Parrinello Molecular Dynamics Calculations for Dye-sensitized Solar Cells\nChapter 23 First-principles Density Functional Theory Calculations for Perovskite Solar Cells\nAppendix: Cell Efficiency Table of Cells with Counter Electrode Catalysts