Dye-senitized solar cells : history, components, configuration and working principle -- Function of photoanode : charge transfer dynamics, challenges and alternative strategies -- Nanoarchitectures as photoanodes -- Light scattering materials as photoanode -- Function of compact (blocking) layer in photoanode -- Function of TiCl4 post-treatment in photoanode -- Doped semiconductor as photoanode -- Binary semiconductor metal oxide as photoanodes -- Plasmonic nanocomposite as photoanode -- Carbon nanotubes-based nanocomposite as photoanode -- Graphene based nanocomposite as photoanode -- Graphitic carbon nitride based nanocomposites as photoanodes.