Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (12): 2826-2830.doi: 10.3866/PKU.WHXB20112826

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Preparation of CIGS Thin Films by Electrodeposition Method Using Ethanol as a Solvent

WANG Xin-Chun, HU Bin-Bin, WANG Guang-Jun, YANG Guang-Hong, WAN Shao-Ming, DU Zu-Liang   

  1. Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004,Henan Province, P. R. China
  • Received:2011-07-25 Revised:2011-09-13 Published:2011-11-25
  • Contact: DU Zu-Liang,
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20371015) and Cultivation Fund of Key Scientific and Technical Innovation Project, Ministry of Education of China (708062).

Abstract: We prepared copper indium gallium diselenide (CIGS) thin films by potentiostatic electrodeposition in an ethanol solution. The thin films were characterized by scanning electron microscopy (SEM), X-ray energy dispersive spectrometry (EDS), X-ray diffraction (XRD), and UV-visible-near infrared (UV-VIS-NIR) spectrophotometry to determine their morphology, composition, crystal structure, and absorption properties. The results show that the chalcopyrite structured CuIn0.7Ga0.3Se2 thin films can be obtained by annealing the electrodeposited films at -1.6 V (vs SCE) at 450 °C. The obtained thin film has uniform morphology, good crystallinity, and a bandgap of about 1.17 eV. We found that ethanol as a solvent can effectively avoid the hydrogen evolution phenomenon, which often occurs in aqueous solution and reduces the deposition potential limitation.

Key words: CIGS thin film, Electrodeposition, Ethanol, Hydrogen evolution, Solar cell