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

fYear

2000

fDate

2000

Firstpage

703

Lastpage

706

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% (V_oc: 0.799 V, J_sc: 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;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialists Conference, 2000. Conference Record of the Twenty-Eighth IEEE

Conference_Location

Anchorage, AK

ISSN

0160-8371

Print_ISBN

0-7803-5772-8

Type

conf

DOI

10.1109/PVSC.2000.915966

Filename

915966