氧化亚铜薄膜的半导体导电性调控及光电化学性能研究
发布时间：2018-11-03 10:40
【摘要】：氧化亚铜(Cu20)在太阳能电池和太阳能分解水应用上具有良好的前景。在这些应用中,Cu20的半导体导电性调控具有重要的意义。本工作采用电化学沉积法在酸性醋酸铜溶液中制备了Cu20薄膜,并分别通过阴离子表面活性剂浓度和沉积电势来调控Cu20薄膜的半导体导电性,同时还对Cu20薄膜在水溶液中的光电化学性能进行了研究。研究发现：(1)在pH 4.93的醋酸铜溶液中恒定沉积电势-0.10V(vs.Ag/AgCl/饱和KCl)时,表面活性剂十二烷基硫酸钠(SDS)的浓度可以控制Cu20薄膜的n型导电和p型导电。当SDS的浓度≤0.85mM时, Cu2O薄膜表现出n型半导体行为；当SDS的浓度≥1.70mM时,Cu2O薄膜则会表现出p型半导体行为,且p型Cu20薄膜中的受主密度随着SDS浓度增大而增大。SDS浓度为2.50 mM时制备的p型Cu20薄膜在3wt%NaCl溶液中具有较好的光电化学稳定性。(2)在SDS浓度为3.30 mM的醋酸铜溶液(pH4.93)中,沉积电势可以控制Cu20薄膜的n型导电和p型导电。当沉积电势比-0.05 V (vs.Ag/AgCl/饱和KCl)正时,Cu20薄膜表现出n型半导体行为；当沉积电势比-0.10V(vs.Ag/AgCl/饱和KCl)负时,Cu20薄膜表现出p型半导体行为,且p型Cu2O薄膜的受主密度随着沉积电势负移而增大；同时p型Cu20薄膜中出现金属Cu,切Cu的含量随着沉积电势负移而增多。
[Abstract]:Cuprous oxide (Cu20) has a good prospect in solar cells and solar energy decomposing water applications. In these applications, the semiconductor conductivity regulation of Cu20 is of great significance. In this work, Cu20 thin films were prepared by electrochemical deposition in acidic copper acetate solution. The semiconductor conductivity of Cu20 thin films was regulated by the concentration of anionic surfactants and deposition potential, respectively. The photoelectrochemical properties of Cu20 thin films in aqueous solution were also studied. The results are as follows: (1) at a constant deposition potential of -0.10V (vs.Ag/AgCl/ saturated KCl) in copper acetate solution of pH 4.93, The concentration of surfactant sodium dodecyl sulfate (SDS) can control the n-type and p-type conductance of Cu20 films. When the concentration of SDS is 鈮，
本文编号：2307545
[Abstract]:Cuprous oxide (Cu20) has a good prospect in solar cells and solar energy decomposing water applications. In these applications, the semiconductor conductivity regulation of Cu20 is of great significance. In this work, Cu20 thin films were prepared by electrochemical deposition in acidic copper acetate solution. The semiconductor conductivity of Cu20 thin films was regulated by the concentration of anionic surfactants and deposition potential, respectively. The photoelectrochemical properties of Cu20 thin films in aqueous solution were also studied. The results are as follows: (1) at a constant deposition potential of -0.10V (vs.Ag/AgCl/ saturated KCl) in copper acetate solution of pH 4.93, The concentration of surfactant sodium dodecyl sulfate (SDS) can control the n-type and p-type conductance of Cu20 films. When the concentration of SDS is 鈮，
本文编号：2307545
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