A low concentration receiver concept for cost effective crystalline back contact cells

Author

Ebert, Matthias ; Dorsam, Tobias ; Fellmeth, Tobias ; Hadrich, Ingrid ; Eitner, Ulrich ; Biro, Daniel ; Wiesenfarth, Maike ; Noriega, Pablo ; Caparros, Sebastian ; Castano, Fernando J.

Author_Institution

Fraunhofer ISE, Freiburg, Germany

fYear

2014

fDate

8-13 June 2014

Firstpage

2111

Lastpage

2116

Abstract

A versatile interconnection and receiver concept for back contact low concentrating crystalline solar cells is presented. The key feature is the AP-C-MWT cell which allows for any cell formats as a multiple of 22.5 × 10 mm². We demon-strate the feasibility of an adequate receiver concept and show the electrical optimization steps for a given concentration. The steps include the electrical finite-element-method (FEM) simula-tion of the interconnector conductivity and an analytical model to derive the optimal geometric design. Finally measured efficiency data for a built prototype are reported, showing a receiver effi-ciency based on string area of 19.2% (C=9.9) and a cell to receiv-er efficiency of 99.3%.

Keywords

finite element analysis; optimisation; solar cells; solar energy concentrators; AP-C-MWT cell; FEM simulation; back contact low concentrating crystalline back contact solar cell; efficiency 19.2 percent; efficiency 99.3 percent; electrical finite-element-method simulation; electrical optimization step; interconnector conductivity; low concentration receiver concept; optimal geometric design; Customer relationship management; Stress; Testing; LCPV; back contact cells; concentrator photovoltaic receiver; silicon concentrator cells; solar cell interconnection;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialist Conference (PVSC), 2014 IEEE 40th

Conference_Location

Denver, CO

Type

conf

DOI

10.1109/PVSC.2014.6925341

Filename

6925341