Controlled synthesis of a textured CuSe(006) film by vacuum thermal treatment of a Se/Cu film structure

A nanocomposite film consisting of crystalline CuSe and amorphous selenium ($a$-Se) was obtained by vacuum-thermal deposition. It has been shown for the first time that thermal heating of a CuSe/$a$-Se nanocomposite film in vacuum can transform it into a textured CuSe(006) film. It has been established that, at the temperature of 438 K, CuSe crystallites grow intensively in the (006) crystallographic plane. Using the X-ray diffraction analysis method and the technique for measuring the electrical resistance of the CuSe/$a$-Se composite film, the phase transformation temperatures at which monoclinic Se$_8$, trigonal $t$-Se, orthorhombic CuSe$_2$, and hexagonal CuSe are formed were determined.