Study of Te aggregation at the initial growth stage of CdZnTe films deposited by CSS

Study of Te aggregation at the initial growth stage of CdZnTe films deposited by CSS
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CSS沉积CdZnTe薄膜生长初期Te聚集的研究

DOI:
10.1007/s00339-012-6907-5
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发表时间:
2012-03
期刊:
Applied Physics A: Materials Science and Processing
影响因子:
--
通讯作者:
Yu, Hui
Yu, Hui
中科院分区:
其他
文献类型:
--
作者:
Gao, Junning;Wang, Tao;Jie, Wanqi;He, Yihui;Sun, Jie;Zhou, Hao;Zha, Gangqiang;Yuan, Yanyan;Tong, Junli;Yu, Hui

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利用能谱和高分辨电子显微镜相结合的方法,研究了近空间升华法沉积的镉锌碲薄膜生长初期的TE聚集现象。Te原子以富Te的非晶层的形式聚集,然后随着薄膜的加厚,这些层通过相互扩散生长成化学计量比的晶体化合物。Te-Te键的高离解能和Te-Te分子比吸附在衬底上的Cd和Zn分子更不稳定的性质导致了Te-Te的聚集。
Te aggregation at the initial growth stage of CdZnTe films deposited by close-spaced sublimation (CSS) is studied with the combination of energy dispersive spectroscopy (EDS) and high resolution transmission electron microscopy (TEM). Te atoms aggregate in the form of Te-rich amorphous layers, and then these layers grow into stoichiometric and crystalline compounds through interdiffusion as the films thickened. Te aggregation is led by the high dissociation energy of Te–Te bond and the less volatile nature of Te2molecules than Cd and Zn molecules absorbed on the substrate.
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