Title :
Approaching high efficiencies over 13% with 2-μm thick CdS/CdTe thin film solar cells
Author :
Nakamura, Kyotaro ; Gotoh, Masahiro ; Fujihara, Toshihiko ; Toyama, Toshihiko ; Okamoto, Hiroaki
Author_Institution :
Dept. of Phys. Sci., Osaka Univ., Japan
Abstract :
Highly efficient CdS/CdTe thin film solar cells with thinner PV active layers are required from a view point of reduction of production cost as well as toxicity of Cd. We have achieved the conversion efficiency of 13.5% (Voc: 0.799 V, Jsc: 24.8 mA/cm 2, F.F.: 0.679, area: 0.42 cm2) using 2.0-μm thick PV active layers. High efficiencies were obtained with annealing temperatures at CdCl2 treatment lower than those for conventional thick (5-10 μm) solar cells. Furthermore, higher oxygen concentration of 7% at the CdCl2 treatment was found to be effective for improvement of the efficiencies
Keywords :
II-VI semiconductors; annealing; cadmium compounds; solar cells; 0.799 V; 13.5 percent; 2.0 mum; Cd toxicity; CdCl2 treatment; CdS; CdS/CdTe thin film solar cells; CdTe; annealing temperatures; conversion efficiency; high efficiencies; higher oxygen concentration; production cost; thinner PV active layers; Annealing; Cascading style sheets; Costs; Energy conversion; Optical films; Photonic band gap; Photovoltaic cells; Production; Temperature; Transistors;
Conference_Titel :
Photovoltaic Specialists Conference, 2000. Conference Record of the Twenty-Eighth IEEE
Conference_Location :
Anchorage, AK
Print_ISBN :
0-7803-5772-8
DOI :
10.1109/PVSC.2000.915966
