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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Thermal relaxation of the structural and optical properties of amorphous As40S60-xSex films
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Thermal relaxation of the structural and optical properties of amorphous As40S60-xSex films

机译：热弛豫非晶As40S60-xSex薄膜的结构和光学性质

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This paper deals with the structural and optical properties of virgin (i.e., as-evaporated) and annealed (i.e., thermally relaxed) amorphous AS(40)S(60-x)Se(x) films (x = 0, 20, 30, 40 and 60 at.%), which were prepared by vacuum evaporation. Structural properties have been inferred from the X-ray diffraction patterns and the Raman spectra of the thin-film samples. The decrease in the intensity of the first sharp diffraction peak after annealing suggests that the thermal relaxation is connected with a decrease in the free volume leading to an increase of the structural compactness. A significant decrease in film thickness has been invariably found after annealing in all cases, which supports this conclusion. Changes found in the Raman spectra of the film samples after annealing indicate a reduction in the concentration of homopolar bonds, which are present in the molecular fragments embedded in the amorphous matrix. Thus, the thermodynamic state of the system is shifted towards equilibrium as a result of thermally induced polymerization (homogenization). These structural changes also resulted in significant changes in both the refractive index and optical band gap, E-g(opt). (C) 2003 Elsevier B.V. All rights reserved. [References: 29]
机译：本文研究了原始（即蒸发）和退火（即热松弛）非晶AS（40）S（60-x）Se（x）薄膜的结构和光学性质（x = 0，20，30 ，40和60 at。％），这是通过真空蒸发制备的。从薄膜样品的X射线衍射图和拉曼光谱可以推断出结构特性。退火后第一个尖锐衍射峰强度的降低表明，热松弛与自由体积的降低有关，从而导致结构致密性的提高。在所有情况下，退火后总是发现薄膜厚度的显着减少，这支持了这一结论。退火后在薄膜样品的拉曼光谱中发现的变化表明同极性键的浓度降低，该同极性键存在于嵌入无定形基质的分子片段中。因此，由于热诱导聚合（均质化）的结果，系统的热力学状态趋于平衡。这些结构变化还导致折射率和光学带隙E-g（opt）都发生了显着变化。 （C）2003 Elsevier B.V.保留所有权利。 [参考：29]

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