Journal
IEEE JOURNAL OF PHOTOVOLTAICS
Volume 6, Issue 4, Pages 1020-1024Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOTOV.2016.2551460
Keywords
Chromatic aberration; concentrator photovoltaics (CPV); Fresnel lens; glass lens; multijunction solar cell; optical efficiency
Funding
- Federal Ministry for the Economics Affairs and Energy (BMWi) under HeKMod4 project [0325750]
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A concentrator standard test condition (CSTC) efficiency of 43.4% for the direct conversion of sunlight into electricity is demonstrated with a subunit of a concentrator photovoltaics (CPV) module. This is the highest reported CSTC efficiency for CPV applications thus far. This test device consists of a four-junction solar cell and uses an achromatic full-glass lens for concentrating the sunlight. The high efficiency is made possible by the combination of a high-efficiency solar cell (46%) and a high-efficiency lens (95%). The I-V curve of the solar cell has been measured for varying distances to the glass lens and compared with the results for a silicone-on-glass Fresnel lens. In this manner, chromatic aberration effects on solar cell performance are discussed in this study.
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