One exemplary embodiment of an electrochromic thin-film material comprises a metal-chalcogen compound; and/or a mixture or solid solution of one or more metal-rich metal-chalcogen compounds and/or lithium. One or more of the metals comprise Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Sb, or Bi, or combinations...http://www.google.co.uk/patents/US7804635?utm_source=gb-gplus-sharePatent US7804635 - Electrochromic thin-film material
