The Bulk (100-x)Ge₃Se₇ - (x)As₂Te₃ (0 ≤ x ≤ 30) glassy alloys were prepared using the melt quenching technique. The elastic moduli (Bulk (K), Micro-hardness (H), Young (Y)), and Poisson's ratio (P_r) of the prepared glasses have been determined using the measured values of the ultrasonic velocities and density (ρ). Values of ρ were measured, then the molar volume (V_m) was estimated theoretically. The DSC thermograms are used to determine the glass transition temperature (T_g). The thermal evaporation method was used to prepare the (100-x)Ge₃Se₇- (x)As₂Te₃ (0 ≤ x ≤ 30) thin films under a vacuum of about 10⁻⁴Pa. The absorbance (A) of the films in the spectral range from 0.45 to 0.85 μm has been measured, then the absorption coefficient (α) and energy gap (E_g) were determined. The Chemical Bond Approach (CBA) has been used successfully to estimate theoretically various physical and structural characteristics of the studied system. Theoretical values of E_g and T_g have been obtained using different methods. The results proved a remarkable agreement between the theoretical and experimental values for both the E_g and T_g. The E_g values decreased from 2.1 to 1.73 eV by increasing the As₂Te₃ content from 0 to 30 at. %. Therefore, these compounds can be used as an absorbing layer for electromagnetic radiation in photovoltaic devices and sensors.

使用熔融淬火技术制备块状 (100-x)Ge ₃ Se ₇ - (x)As ₂ Te ₃ (0 ≤ x ≤ 30) 玻璃态合金。所制备玻璃的弹性模量（体积 ( K )、显微硬度 ( H )、杨氏 ( Y )）和泊松比 ( P _r ) 已使用超声波速度和密度 ( ρ )的测量值确定。测量 ρ 值，然后从理论上估计摩尔体积 ( V _m )。DSC 热谱图用于确定玻璃化转变温度 ( T _g）。采用热蒸发法在约10 ^-4 Pa的真空下制备(100-x)Ge ₃ Se ₇ - (x)As ₂ Te ₃ (0 ≤ x ≤ 30)薄膜。吸光度(A)测量了光谱范围从 0.45 到 0.85 μm 的薄膜，然后确定了吸收系数 (α) 和能隙 ( E _g )。化学键法 (CBA) 已成功用于从理论上估计所研究系统的各种物理和结构特征。E _g和T _{g 的}理论值已使用不同的方法获得。结果证明E _g和T _g的理论值和实验值之间具有显着的一致性。通过将 As ₂ Te ₃含量从 0 at 增加到 30 at ，E _g值从 2.1 eV 降低到 1.73 eV 。%。因此，这些化合物可用作光伏器件和传感器中电磁辐射的吸收层。