We annealed the films at different temperatures (100, 150 and 200 °C) under N2 ambient for 8 h, and characterized the crystallinity and morphology of the Bi–Te films. Microstructure characterization using X-ray diffraction and scanning electron microscopy disclosed that the post-annealing treatment entailed a drastic microstructural evolution by inducing the development of a strong texture of grains with their c-axis oriented normal to the substrate.