Characteristics of Concentrator Triple Junction Cell Optimized for Current Matching

Author

Yoshida, Atsushi ; Juso, Hiroyuki ; Agui, Takaaki ; Nakamura, Kazuyo ; Sasaki, Kazuaki ; Takamoto, Tatsuya ; Tanaka, Masao ; Kaneiwa, Minoru ; Okamoto, Kohji

Author_Institution

Solar Syst. Dev. Center, Sharp Corp., Nara

Volume

1

fYear

2006

fDate

38838

Firstpage

757

Lastpage

759

Abstract

In the case of the triple-junction cell, in order to get maximum photo-current, current-matching for incident light by optimization of subcell thickness is important. At the concentrator application using lenses, the spectrum of concentrated light is different vastly from that of standard light, because of chromatic aberration. Therefore, it is also important to optimize the distance between lenses and the cell to get maximum photo-current. In this paper, we evaluated cell performance with different thickness of the top cell as a function of distance between the cell and lenses. The current result shows the structural change of the optical system affects significantly the performance of the system. And the triple-junction cell with top cell thickness optimized for AM 1.5 condition, photo-current of the top cell is equal to that of the middle cell, shows highest Isc and conversion efficiency under concentration at any concentration ratio

Keywords

aberrations; lenses; optimisation; photoconductivity; solar cells; solar energy concentrators; chromatic aberration; concentrator triple junction cell; current matching; incident light; lenses; optical system; optimization; photocurrent; top cell; Costs; III-V semiconductor materials; Lenses; Mechanical systems; Optical materials; Photoconductivity; Photovoltaic cells; Plastics; Solar system;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Energy Conversion, Conference Record of the 2006 IEEE 4th World Conference on

Conference_Location

Waikoloa, HI

Print_ISBN

1-4244-0017-1

Electronic_ISBN

1-4244-0017-1

Type

conf

DOI

10.1109/WCPEC.2006.279566

Filename

4059739