Electrochromic film and device comprising the same

Electrochromic film with the general formula: ApBqOxXy wherein: -A is one or more of the elements from the group consisting of Ni, Ir, Cr, V, Mn, Fe, W, Mo, Ti, Co, Ce, Pr and Hf; -B is one or more of the elements from the group consisting of Mg, Ca, Sr, Ba, Nb, Al, Zr, Ta and Si; -O is oxygen; -X is an element from the group consisting of: H, F and N; and the ratio q/p is greater than 0.2 and less than 3.5, x is greater than 0.5(p+q) and less than 5(p+q), and y is equal to or greater than 0 and less than 2×. The film may further comprise an amount of Li, Na or K. The invention further relates to an electrochromic device comprising at least one layer of said electrochromic film.