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高活性氧化亚铜薄膜材料的绿色合成研究
Achraf El Kasmi*,Henning Vieker,吴令男,André Beyer,Tarik Chafik,田振玉*
作者单位E-mail
Achraf El Kasmi* 中国科学院工程热物理研究所北京 100190阿卜杜勒马立克?爱莎蒂大学坦吉尔 B.P. 416 achraf@iet.cn 
Henning Vieker 德国比勒菲尔德大学比勒菲尔德 D-33615  
吴令男 中国科学院工程热物理研究所北京 100190  
André Beyer 德国比勒菲尔德大学比勒菲尔德 D-33615  
Tarik Chafik 阿卜杜勒马立克?爱莎蒂大学坦吉尔 B.P. 416  
田振玉* 中国科学院工程热物理研究所北京 100190中国科学院大学北京 100049 tianzhenyu@iet.cn 
摘要:
本文采用一步脉冲雾化化学气相沉积法在250 oC下制备了氧化亚铜薄膜催化剂. 实验研究了前驱体中掺杂水对氧化铜薄膜表面形貌、拓扑结构、表面成分和光学特性的影响规律. 结果表明所制得的催化剂为纯相的氧化亚铜. 前驱体溶液中掺杂水会导致氧化亚铜的晶粒变小,从而使得其光学能隙从2.16 eV降至2.04 eV. 原子力显微镜结果表明随着水的加入,氧化亚铜的表面粗糙度降低,表面更加均匀. 此外,利用密度泛函理论计算得到了水和乙醇在氧化亚铜薄膜表面的吸附和反应特性,并提出了氧化亚铜的形成机理. 本文开发了一种低成本且实际可行的薄膜制造方法,该方法在太阳能电池和半导体等领域具有潜在应用.
关键词:  氧化亚铜薄膜,脉冲雾化热蒸发化学气相沉积,绿色合成,光学和拓扑特性,光学带隙,密度泛函理论计算
DOI:10.1063/1674-0068/cjcp1812277
分类号:
基金项目:
Enhanced Property of Thin Cuprous Oxide Film Prepared through Green Synthetic Route
Achraf El Kasmi*,Henning Vieker,Ling-nan Wu,André Beyer,Tarik Chafik,Zhen-yu Tian*
Abstract:
Thin cuprous oxide films have been prepared by chemical vapor deposition (pulsed spray evaporation-chemical vapor deposition) method without post-treatment. The synthesis of cuprous oxide was produced by applying a water strategy effect. Then, the effect of water on the morphology, topology, structure, optical properties and surface composition of the obtained films has been comprehensively investigated. The results reveal that a pure phase of Cu2O was obtained. The introduction of a small quantity of water in the liquid feedstock lowers the band gap energy from 2.16 eV to 2.04 eV. This finding was mainly related to the decrease of crystallite size due to the effect of water. The topology analyses, by using atomic force microscope, also revealed that surface roughness decreases with water addition, namely more uniform covered surface. Moreover, theoretical calculations based on density functional theory method were performed to understand the adsorption and reaction behaviors of water and ethanol on the Cu2O thin film surface. Formation mechanism of the Cu2O thin film was also suggested and discussed.
Key words:  Cuprous oxide thin films, Pulsed spray evaporation-chemical vapor deposition method, Green synthetic route, Optical and topology property, Band gap, Density functional theory calculation