摘要
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.
作者
Ling-nan Wu
Zhen-yu Tian
Achraf El Kasmi;Henning Vieker;吴令男;André Beyer;Tarik Chafik;田振玉(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;中国科学院大学,北京100049;德国比勒菲尔德大学,比勒菲尔德D-33615)
基金
supported by the Ministry of Science and Technology of China(No.2017YFA0402800)
the National Natural Science and Technology of China(No.91541102 and No.51476168)
the support by Chinese Academy of Sciences for Senior International Scientists within President’s International Fellowship Initiative(PIFI)program
the financial support during his Ph.D.research stay at Bielefeld University
The Moroccan institute of IRESEN is acknowledged for the financial support(Innowind13 Nanolubricant)
