• DocumentCode
    683125
  • Title

    CuIn1−xAlxSe2 solar cells fabricated on the flexible substrates by co-sputtering and modified selenization

  • Author

    Murali, B. ; Krupanidhi, S.B.

  • Author_Institution
    Mater. Res. Centre, Indian Inst. of Sci., Bangalore, India
  • fYear
    2013
  • fDate
    16-21 June 2013
  • Firstpage
    2011
  • Lastpage
    2016
  • Abstract
    CuIn1-xAlxSe2 (CIAS) thin films were grown on the flexible stainless steel substrates, by dc co-sputtering from the elemental cathodes. CuInAl alloyed precursor films were selenized both by noble gas assisted Se vapor transport and vacuum evaporation of Se. X-ray diffraction, scanning electron microscopy and UV-visible absorption spectroscopy were used to characterize the selenized films. The composition (x=Al/Al+In) with 0≤x≤0.65 was varied by substituting Al with indium in CuInSe2. Lattice parameters, average crystallite sizes and compact density of the films compared to CuInSe2, decreased and (112) peak shifted to higher Bragg´s angle, with Al incorporation. Cells were fabricated with the device structure SS/Mo/CIAS/CdS/iZno-AZO/Al. Best cell showed the efficiency of 6.8%, with x=0.13, Eg=1.17 eV, fill factor 45.04, short circuit current density Jsc 30 mA/cm2.
  • Keywords
    X-ray diffraction; absorption; aluminium compounds; copper compounds; indium compounds; scanning electron microscopy; selenium compounds; semiconductor thin films; solar cells; sputtering; CIAS thin films; CuIn1-xAlxSe2; UV-visible absorption spectroscopy; X-ray diffraction; dc cosputtering; elemental cathodes; flexible stainless steel substrates; flexible substrates; precursor films; scanning electron microscopy; vacuum evaporation; vapor transport; Alloying; Films; Gallium; Photonic band gap; Photovoltaic cells; Substrates; Inorganic materials; Instruments; Sputtering; Thin films; photovoltaic cells;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Photovoltaic Specialists Conference (PVSC), 2013 IEEE 39th
  • Conference_Location
    Tampa, FL
  • Type

    conf

  • DOI
    10.1109/PVSC.2013.6744867
  • Filename
    6744867