Mechanistic Study of Chemical Deposition of ZnS Thin Films from Aqueous Solutions Containing Zinc Acetate and Thioacetamide by Comparison with Homogeneous Precipitation
Mechanistic Study of Chemical Deposition of ZnS Thin Films from Aqueous Solutions Containing Zinc Acetate and Thioacetamide by Comparison with Homogeneous Precipitation
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DOI：
10.1021/jp025676q
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发表时间：
2003
影响因子：
3.3
通讯作者：
K. Yamaguchi;Tsukasa Yoshida;A. Lincot;H. Minoura
中科院分区：
文献类型：
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作者：
K. Yamaguchi;Tsukasa Yoshida;A. Lincot;H. Minoura
研究了在50 ~ 90 °C的温度范围内，在醋酸锌-硫代乙酰胺（TAA）水溶液中化学浴沉积ZnS薄膜（CBD）的情况。薄膜生长的速率进行了比较，均匀沉淀的ZnS。薄膜的生长被发现进行积累的ZnS纳米晶（4 nm）形成在溶液中根据集群机制。在本系统中的沉淀反应的速率已被描述的速率方程，dPt/dt = k[Zn（II）]n[TAA]n，其中Pt是在时间t的ZnS沉淀物的浓度，k是温度激活的反应速率常数，和n是表观反应级数，这是确定为0.64的现象。基于膜生长速率与沉淀速率成比例的假设，将相同的速率方程成功地应用于膜生长，即，Ft = mPt，其中Ft是时间t时的膜厚度，m是比例因子。这一结果表明...
Chemical bath deposition of ZnS thin films (CBD) in zinc acetate-thioacetamide (TAA) aqueous solutions has been studied in the temperature range between 50 and 90 °C. The rate of film growth is compared to that of homogeneous precipitation of ZnS. The film growth was found to proceed by accumulation of ZnS nanocrystallites (4 nm) formed in the solution according to a cluster-by-cluster mechanism. The rate of the precipitation reaction in the present system has been phenomenologically well described by the rate equation, dPt/dt = k[Zn(II)]n[TAA]n, where Pt is the concentration of ZnS precipitate at time t, k is the temperature-activated reaction rate constant, and n is the apparent reaction order, which was determined as 0.64. The same rate equation was successfully applied to the film growth based on the assumption that the rate of the film growth is proportional to that of the precipitation, i.e., Ft = mPt, where Ft is the film thickness at time t and m is a proportionality factor. This result shows that...