SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (2): 421-427.DOI: 10.1016/j.cjche.2017.06.023

• Materials and Product Engineering • 上一篇    下一篇

Electrodeposition and characterization of Cu2O thin films using sodium thiosulfate as an additive for photovoltaic solar cells

Hassiba Rahal1,2, Rafiaa Kihal1,3, Abed Mohamed Affoune1, Samia Rahal4   

  1. 1 Laboratoire d'Analyses Industrielles et Génie des Matériaux, Département de Génie des Procédés, Faculté des Sciences et de la Technologie, Université;
    8 Mai 1945 Guelma, BP 401, Guelma 24000, Algeria;
    2 Université 20 Août 1955 Skikda, BP 26, Route El-Hadaiek, 21000, Algeria;
    3 Université Abbes Laghrour Khenchela, BP 1252, Rue de Batna, Khenchela 40004, Algeria;
    4 Laboratoire d'Etude des Surfaces et Interfaces de la Matière Solide LESIMS, Département de Physique, Faculté des Sciences, Badji Mokhtar Université, Annaba, Algeria
  • 收稿日期:2017-03-17 修回日期:2017-06-14 出版日期:2018-02-28 发布日期:2018-03-16
  • 通讯作者: Abed Mohamed Affoune
  • 基金资助:

    Supported by the Algerian Ministry of Higher Education and Scientific Research (CNEPRU project number:J0101520090018).

Electrodeposition and characterization of Cu2O thin films using sodium thiosulfate as an additive for photovoltaic solar cells

Hassiba Rahal1,2, Rafiaa Kihal1,3, Abed Mohamed Affoune1, Samia Rahal4   

  1. 1 Laboratoire d'Analyses Industrielles et Génie des Matériaux, Département de Génie des Procédés, Faculté des Sciences et de la Technologie, Université;
    8 Mai 1945 Guelma, BP 401, Guelma 24000, Algeria;
    2 Université 20 Août 1955 Skikda, BP 26, Route El-Hadaiek, 21000, Algeria;
    3 Université Abbes Laghrour Khenchela, BP 1252, Rue de Batna, Khenchela 40004, Algeria;
    4 Laboratoire d'Etude des Surfaces et Interfaces de la Matière Solide LESIMS, Département de Physique, Faculté des Sciences, Badji Mokhtar Université, Annaba, Algeria
  • Received:2017-03-17 Revised:2017-06-14 Online:2018-02-28 Published:2018-03-16
  • Contact: Abed Mohamed Affoune
  • Supported by:

    Supported by the Algerian Ministry of Higher Education and Scientific Research (CNEPRU project number:J0101520090018).

摘要: Cuprous oxide (Cu2O) thin films have been grown by electrodeposition technique onto ITO-coated glass substrates from aqueous copper acetate solutions with addition of sodium thiosulfate at 60℃. The effects of sodium thiosulfate on the electrochemical deposition of Cu2O films were investigated by cyclic voltammetry and chronoamperometry techniques. Deposited films were obtained at -0.58 V vs. SCE and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and optical, photoelectrochemical and electrical measurements. X-ray diffraction results indicated that the synthesized Cu2O films had a pure cubic phase with a marked preferential orientation peak along (200) plane and with lattice constants a=b=c=0.425 nm. FTIR results confirmed the presence of Cu2O films at peak 634 cm-1. SEM images of Cu2O films showed a better compactness and spherical-shaped composition. Optical properties of Cu2O films reveal a high optical transmission (>80%) and high absorption coefficient (α > 104 cm-1) in visiblelight region. The optical energy band gap was found to be 2.103 eV. Photoelectrochemical measurements indicated that Cu2O films had n-type semiconductor conduction, which confirmed by Hall Effect measurements. Electrical properties of Cu2O films showed a low electrical resistivity of 61.30 Ω·cm-1, carrier concentration of -4.94×1015 cm-3 and mobility of 20.61 cm2·V-1·s-1. The obtained Cu2O thin films with suitable properties are promising semiconductor material for fabrication of photovoltaic solar cells.

关键词: Electrodeposition, Cuprous oxide, Thin films, Semiconductor, Cyclic voltammetry, Photoelectrochemical measurements

Abstract: Cuprous oxide (Cu2O) thin films have been grown by electrodeposition technique onto ITO-coated glass substrates from aqueous copper acetate solutions with addition of sodium thiosulfate at 60℃. The effects of sodium thiosulfate on the electrochemical deposition of Cu2O films were investigated by cyclic voltammetry and chronoamperometry techniques. Deposited films were obtained at -0.58 V vs. SCE and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and optical, photoelectrochemical and electrical measurements. X-ray diffraction results indicated that the synthesized Cu2O films had a pure cubic phase with a marked preferential orientation peak along (200) plane and with lattice constants a=b=c=0.425 nm. FTIR results confirmed the presence of Cu2O films at peak 634 cm-1. SEM images of Cu2O films showed a better compactness and spherical-shaped composition. Optical properties of Cu2O films reveal a high optical transmission (>80%) and high absorption coefficient (α > 104 cm-1) in visiblelight region. The optical energy band gap was found to be 2.103 eV. Photoelectrochemical measurements indicated that Cu2O films had n-type semiconductor conduction, which confirmed by Hall Effect measurements. Electrical properties of Cu2O films showed a low electrical resistivity of 61.30 Ω·cm-1, carrier concentration of -4.94×1015 cm-3 and mobility of 20.61 cm2·V-1·s-1. The obtained Cu2O thin films with suitable properties are promising semiconductor material for fabrication of photovoltaic solar cells.

Key words: Electrodeposition, Cuprous oxide, Thin films, Semiconductor, Cyclic voltammetry, Photoelectrochemical measurements