Glasses of (Se₉₀Te₁₀)₉₅M₅ (where M = Zn and Bi) were prepared using a melt–quench procedure. These incorporated elements were chosen as examples of transition metals and basic metal groups, respectively. Thin films of these glasses at a thickness of 100 nm were evaporated onto cleaned glass substrates. Structural investigations were studied using XRD, SEM, and DSC. The glass transition, T_g, and Onset crystallization behavior of glasses, T_c of (Se₉₀Te₁₀)₉₅M₅ (M = Zn and Bi) alloys were analyzed using DSC at a heating rate of 15 K min⁻¹. XRD patterns confirmed the amorphous nature of the films. The absorption coefficient, α, and refractive index, n, were obtained for (Se₉₀Te₁₀)₉₅M₅ (M = Zn and Bi) films. The E_g values of Se₉₀Te₁₀ increase as dopant by Zn. Conversely, it decreases as dopant by Bi. Moreover, the optical constants of (Se₉₀Te₁₀)₉₅M₅ (M = Zn and Bi) films were estimated. The estimated results confirm the applicability of modifying samples to be used using in optoelectronics applications.