[15p-A34-1~19] 13.10 Compound solar cells

▲ [15p-A34-16] Transport efficiency mapping in multijunction solar cells by luminescence measurement

〇(PC)Amaury Delamarre^1,3, Paul Verdier^1,3, Kentaroh Watanabe^1,3, Masakazu Sugiyama^2,3, Yoshiaki Nakano^2,3, Jean Francois Guillemoles^1,3 (1.RCAST, The University of Tokyo, 2.Department of Electrical Engineering and Information Systems, The University of Tokyo, 3.NextPV, LIA CNRS-RCAST/U. Tokyo-U. Bordeaux)

Keywords:Photovoltaic, Luminescence, Collection efficiency

Multijunction solar cells (MJSC) are currently the devices offering the largest conversion efficiencies of the solar radiation (above 45%). Among the different strategies to improve their characteristics, one would be to operate them at higher sunlight concentrations (current standards are from 500 to 1000). Nevertheless, the maximum achievable concentration is limited by the various series resistances of the cells: window layer sheet resistance, metal / semiconductor resistance, tunnel junctions…
To investigate the underlying mechanisms, we introduce a new characterization method, allowing to access transport efficiency maps through processing of luminescence images. Such a method is significantly faster than what could be done with a Light Beam Induced Current setup, and brings additional information compared to the widely used electroluminescence emission measurements in MJSC.