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用真空热蒸发法在玻璃衬底制备CdTe和Gd掺杂CdTe薄膜。研究热处理和Gd掺杂量对CdTe薄膜结构、光学特性的影响。结果表明,薄膜均为立方闪锌矿结构,Gd的掺入没有改变薄膜的晶体结构,但使薄膜的晶粒尺寸减小,晶格常数和晶胞体积略有增大,并使其择优取向由[220]晶向变为[111]晶向。掺Gd使薄膜在可见光范围透过率增强,但对光能隙影响不大。
Preparation of CdTe and Gd-doped CdTe films on glass substrates by vacuum thermal evaporation. The effects of heat treatment and Gd doping on the structure and optical properties of CdTe films were investigated. The results show that the films are cubic sphalerite structure, Gd incorporation did not change the crystal structure of the film, but the film grain size decreases, the lattice constant and unit cell volume slightly increased, and its preferred orientation From [220] to the [111] crystal orientation. Gd doped films in the visible range of transmittance increased, but little effect on the optical energy gap.