Title :
Pressure dependent synthesis of CuInSe2 thin film solar cells from electrodeposited binary selenide stacks
Author :
Fischer, Johannes ; Larsen, Jes ; Lambrechts, Jean-Christophe ; Siebentritt, Susanne ; Dale, Phillip J.
Author_Institution :
Univ. du Luxembourg, Belvaux, Luxembourg
Abstract :
CuInSe2 absorber films were fabricated by annealing electrodeposited stacks of copper selenide on indium selenide. The inert background gas pressure during annealing was varied and the absorber composition, grain size and structure characterized. X-ray diffraction verified the formation of CuInSe2. Compared to one-step electrodeposited CuInSe2 precursors the absorbers obtained from binary selenide precursors show larger grain size and improved crystal quality. Grain size increases further with higher annealing pressure and electronic quality improves as can be seen from an exciton transition in photoluminescence. Completed devices showed a best efficiency of 5.0%.
Keywords :
X-ray diffraction; annealing; electrodeposition; photoluminescence; solar cells; thin films; CuInSe2; X-ray diffraction; XRD; absorber composition; absorber films; annealing pressure; efficiency 5.0 percent; electrodeposited binary selenide stacks; electronic quality; exciton transition; grain size; improved crystal quality; inert background gas pressure; one-step electrodeposited precursors; photoluminescence; pressure dependent synthesis; thin film solar cells; Annealing; Atmosphere; Copper; Films; Grain size; Photovoltaic cells;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2011 37th IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-9966-3
DOI :
10.1109/PVSC.2011.6185968
