Citation: Yong-Juan Lu, Jun-Hong Jia. The effect of complexing agent on crystal growth, structure and properties of nanostructured Cu_2-xS thin films[J]. Chinese Chemical Letters, ;2014, 25(11): 1473-1478. doi: 10.1016/j.cclet.2014.06.003 shu

The effect of complexing agent on crystal growth, structure and properties of nanostructured Cu_2-xS thin films

Yong-Juan Lu ^a,, ,
Jun-Hong Jia ^b,,

1.
a The School of Chemical Engineering, The Northwest University for Nationalities, Lanzhou 730030, China;
2.
b State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China

Corresponding author: Yong-Juan Lu, Jun-Hong Jia,
Received Date: 8 April 2014
Available Online: 28 May 2014

Thin films of Cu_2-xS (x=0, 1) were deposited on self-assembled, monolayer modified substrates in the copper-thiosulfate system with various concentrations of ethylene diamine tetraacetic acid (EDTA) at a low temperature of 70℃. The thin films were characterized by means of X-ray diffraction (XRD), X-ray photoelectron spectroscope (XPS), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM). The optical and photoelectrochemical (PEC) properties of the Cu_2-xS semiconductor films were investigated by ultraviolet-visible (UV-vis) absorption spectroscopy and a three-electrode system. It is found that EDTA plays a key role in the process of Cu_2-xS nanocrystals formation and growth. The compositions of the Cu_2-xS nanocrystals varied from Cu₂S (chalcocide) to CuS (covellite) through adjusting the concentration of EDTA, which is used as a complexing agent to yield high-quality Cu_2-xS films. The growth mechanisms of Cu_2-xS nanocrystals with different EDTA concentrations are proposed and discussed in detail.
- Thin film,
- Chemical synthesis,
- Optical properties,
- Photoelectrochemical properties
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

The effect of complexing agent on crystal growth, structure and properties of nanostructured Cu2-xS thin films

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通讯作者: 陈斌, bchen63@163.com

The effect of complexing agent on crystal growth, structure and properties of nanostructured Cu_2-xS thin films