论文信息 - 30% monolithic tandem concentrator solar cells for concentrations exceeding 1000 suns

30% monolithic tandem concentrator solar cells for concentrations exceeding 1000 suns

Results of a cost study for concentrator systems are discussed. In this context it is concluded that high-concentration and high-efficiency solar cells are beneficial for lowering the cost of PV produced energy. MOVPE-grown Ga/sub 0.35/P/Ga/sub 0.83/In/sub 0.17/As monolithic tandem cells are developed for the application in such high-concentration systems. These solar cell structures are grown lattice mismatched on GaAs substrates. An efficiency of >31 % at 300/spl times/ AM 1.5D and around 30 % at a 1000/spl times/ concentration was measured. An all-glass test module with an aperture area of 64 cm/sup 2/ was built up and showed an efficiency of >24 % measured under outdoor conditions. The module has a geometrical concentration factor of 123. This result can be further improved by increasing the concentration ratio and optimizing the cell structure.

[1] F. Dimroth,et al. Progress in development of all-glass terrestrial concentrator modules based on composite Fresnel lenses and III-V solar cells , 2000, Conference Record of the Twenty-Eighth IEEE Photovoltaic Specialists Conference - 2000 (Cat. No.00CH37036).

[2] U. Schubert,et al. MOVPE grown Ga1−xInxAs solar cells for GaInP/GaInAs tandem applications , 2000 .

[3] Frank Dimroth,et al. III-V compounds for solar cell applications , 1999 .

[4] Daniel J. Friedman,et al. Accelerated publication 30.2% efficient GaInP/GaAs monolithic two‐terminal tandem concentrator cell , 1995 .

[5] F. Dimroth,et al. High C-doping of MOVPE grown thin AlxGa1−xAs layers for AlGaAs/GaAs interband tunneling devices , 2000 .

[6] K. Emery,et al. Triple-junction solar cell efficiencies above 32%: the promise and challenges of their application in high-conceniration-ratio PV systems , 2000, Conference Record of the Twenty-Eighth IEEE Photovoltaic Specialists Conference - 2000 (Cat. No.00CH37036).

[7] K. Emery,et al. Procedures for evaluating multijunction concentrators , 2000, Conference Record of the Twenty-Eighth IEEE Photovoltaic Specialists Conference - 2000 (Cat. No.00CH37036).

[8] Hiroshi Kurita,et al. Over 30% efficient InGaP/GaAs tandem solar cells , 1997 .