DocumentCode
683125
Title
CuIn1−x Alx Se2 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
Link To Document