Title :
Efficient continuous-flow chemical bath deposition of CdS films as buffer layers for chalcogenide-based solar cells
Author :
Tosun, B. Selin ; Abrahamson, Joel T. ; Cheng, C.-C. ; Campbell, Stephen A. ; Aydil, Eray S.
Author_Institution :
Dept. of Chem. Eng. & Mater. Sci., Univ. of Minnesota, Minneapolis, MN, USA
Abstract :
The highest power conversion efficiencies in copper indium gallium diselenide (CIGS) solar cells are achieved when a cadmium sulfide (CdS) buffer layer is deposited on the CIGS absorber through chemical bath deposition (CBD). These CdS buffer layers are also used in emerging kesterite solar cells such as those based on copper zinc tin sulfide/selenide. Herein, we describe a novel continuous-flow chemical bath deposition (CF-CBD) system for efficient utilization of chemicals during CdS film deposition. CdS films are grown on 10-cm-diameter molybdenum-coated silicon wafers to demonstrate the potential of the method to achieve uniform thin CdS films.
Keywords :
chemical vapour deposition; molybdenum; solar cells; ternary semiconductors; CF-CBD system; CdS; CuInGaSe; Mo; buffer layers; cadmium sulfide films; chalcogenide-based solar cells; chemical utilization; continuous-flow chemical bath deposition; copper indium gallium diselenide solar cells; copper zinc tin selenide; copper zinc tin sulfide; film deposition; kesterite solar cells; molybdenum-coated silicon wafers; power conversion efficiencies; Chemicals; Films; Photovoltaic cells; Rough surfaces; Substrates; Surface roughness; Surface treatment; CdS; Chemical Bath Deposition; Continuous-Flow Chemical Bath Deposition; Thin Film Photovoltaic Cells;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2013 IEEE 39th
Conference_Location :
Tampa, FL
DOI :
10.1109/PVSC.2013.6744353
