物理化学学报 >> 2009, Vol. 25 >> Issue (10): 1998-2004.doi: 10.3866/PKU.WHXB20091028

研究论文 上一篇    下一篇

温度对ZnO薄膜电沉积的影响

王艳坤, 张建民, 兰梦   

  1. 郑州大学化学系, 郑州 450001|河南教育学院化学系, 郑州 450014
  • 收稿日期:2009-05-20 修回日期:2009-07-14 发布日期:2009-09-29
  • 通讯作者: 张建民 E-mail:zhjm@zzu.edu.cn

Temperature Effects on ZnO Film Electrodeposition

WANG Yan-Kun, ZHANG Jian-Min, LAN Meng   

  1. Department of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China|Department of Chemistry, Henan Institute of Education, Zhengzhou 450014, P. R. China
  • Received:2009-05-20 Revised:2009-07-14 Published:2009-09-29
  • Contact: ZHANG Jian-Min E-mail:zhjm@zzu.edu.cn

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摘要：

通过0.1 mol·L-1 Zn(NO3)2体系在不同温度下的电势-pH图、组分的分布系数和ZnO/Zn(OH)2沉淀的溶解度热力学计算得出最佳电沉积实验条件及最终沉积产物. 随后用沉积过程的循环伏安曲线、电流密度-时间曲线、薄膜的X射线粉末衍射(XRD)、扫描电子显微镜(SEM)和热重-差热(TG-DSC)实验结果验证了热力学理论分析. 光学研究发现, ZnO薄膜在可见光区具有高透光度(>80%)和较为陡峭的吸收边缘. 提出硝酸锌水溶液中电沉积ZnO的反应机理.

关键词: ZnO, 温度, 电沉积, 反应机理

Abstract:

A thermodynamic study of temperature effects on the 0.1 mol·L-1 Zn(NO3)2 systemby means of potential pH diagram, species repartition diagram, and solubility of ZnO/Zn(OH)2 was presented with the aim of guiding future electrodeposition conditions and for the prediction of the ultimate product. These thermodynamic calculations were testified by analyzing curves of the cathodic current density as a function of time and cyclic voltammetry (CV), X-ray diffraction (XRD), scanning electron microscopy (SEM), thermal gravimetric-differential scanning calorimeter (TG-DSC), and ultraviolet-visible (UV-Vis) spectroscopy. Optical studies revealed that the ZnO films exhibited a high transmittance in the visible region (>80%) and a steep absorption edge. A reaction mechanism was proposed for ZnO electrodeposition in zinc nitrate aqueous solutions.

Key words: ZnO, Temperature, Electrodeposition, Reaction mechanism