Orientation-controlling Growth of Electrodeposited ZnO Films on Cathode

LIU Wen-jun; CAI Shao-min; XIE Hong-si; CAO Pei-jiang; JIA Fang; ZHU De-liang; MA Xiao-cui

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Orientation-controlling Growth of Electrodeposited ZnO Films on Cathode

paper | 更新时间：2020-08-12

- Orientation-controlling Growth of Electrodeposited ZnO Films on Cathode
- Chinese Journal of Luminescence Vol. 31, Issue 2, Pages: 214-218(2010)
- 作者机构：
  
  深圳大学材料学院, 深圳市特种功能材料重点实验室,广东深圳,518060
- 作者简介：
- 基金信息：
- DOI：
  CLC： O484.1
- Received：20 November 2009，
  
  Revised：02 January 1900，
  
  Published Online：30 April 2010，
  
  Published：30 April 2010
- 稿件说明：
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LIU Wen-jun, CAI Shao-min, XIE Hong-si, et al. Orientation-controlling Growth of Electrodeposited ZnO Films on Cathode[J]. Chinese journal of luminescence, 2010, 31(2): 214-218.
DOI：

LIU Wen-jun, CAI Shao-min, XIE Hong-si, et al. Orientation-controlling Growth of Electrodeposited ZnO Films on Cathode[J]. Chinese journal of luminescence, 2010, 31(2): 214-218. DOI：

摘要

采用阴极电沉积法

在Zn(NO

)

水溶液中

以304不锈钢为衬底制备了ZnO薄膜

研究了Zn

浓度和电流密度对ZnO薄膜择优取向的影响规律。XRD结果表明:随着Zn

浓度和电流密度增大

ZnO薄膜逐渐由(002)面择优取向生长转变为(101)面择优取向生长;当Zn

浓度为0.005 mol·L

-1

、电流密度为2.0 mA·cm

-2

或Zn

浓度为0.05 mol·L

-1

、电流密度为0.5 mA·cm

-2

时

可以得到(002)面择优取向生长的ZnO薄膜;当Zn

浓度为0.05 mol·L

-1

、电流密度为2.0 mA·cm

-2

时

可以得到(101)面择优取向生长的ZnO薄膜。根据二维晶核理论

通过分析不同生长条件下的过饱和度及其对ZnO的(002)型和(101)型二维晶核形核活化能的影响

对这一规律进行了解释。可见

通过改变Zn

浓度和电流密度能够实现阴极电沉积ZnO薄膜的取向可控生长。

Abstract

It is important to control the orientation of ZnO film because many properties of ZnO film vary with its preferred orientation. Most of ZnO films ever reported are orientated towards

-axis. However

in the light-emitting application

nonpolar or semipolar ZnO films grown not along with

-axis are much preferable because the luminous efficiency of the

-axis orientated ZnO film is low due to the quantum confined Stark effect. Thus

the study of ZnO film grown along with other than

-axis is necessary. In this paper

ZnO films were fabricated on 304 stainless steel substrates by the cathodic electrodeposition in Zn(NO)

aqueous solution

and the influences of Zn

concentration and the current density on the preferred orientation of the ZnO film were studied. X-ray diffraction results showed that as Zn

concentration and the current density increases

the preferred orientation of ZnO film changes from (002) to (101) gradually. When Zn

concentration is 0.005 mol·L

-1

and the current density is 2.0 mA·cm

-2

or Zn

concentration is 0.05 mol·L

-1

and the current density is 0.5 mA·cm

-2

the prepared ZnO films are (002) preferred orientation. When Zn

concentration is 0.05 mol·L

-1

and the current density is 2.0 mA·cm

-2

the prepared ZnO film is (101) preferred orientation. The phenomenon can be explained based on the two-dimensional nuclei theory. When Zn

concentration or the current density is low

the supersaturation of ZnO around substrate is also low and the nucleation activation energy of two-dimensional (002) nuclei is lower than that of (101) nuclei

therefore ZnO film is (002) preferred orientation. When Zn

concentration and the current density is high

the supersaturation of ZnO is also high and the nucleation activation energy of (002) nuclei is higher than that of (101) nuclei

therefore ZnO film is (101) preferred orientation. The results suggested that orientation-controllable growth of the cathodically electrodeposited ZnO films can be achieved by adjusting Zn

concentration and the current density.

关键词

Keywords

references

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