Cell-to-Module Losses of Three Terminal Tandem Solar Devices

misc

29.09.2022

authors
Schulte-Huxel, H. and Witteck, R. and Blankemeyer, S. and Köntges, M. and Rienäcker, M. and Kajari-Schröder, S. and Peibst, R.

featured_in
World Conference on Photovoltaic Energy Conversion (WCPEC), Milano

abstract

Three-terminal (3T) tandem solar cells require an adapted module integration scheme in order to explore their full efficiency potential. The three terminals allow to extract the power of the top and bottom cell separately. In a cell string the wide bandgap top cells are interconnected in parallel to multiple bottom cells resulting in a parallel/series interconnection. Here, we analyze by simulations and experiments the aspects of the module integration of 3T cells. We present an approach for the integration of bypass diodes for the protection against shading effects that allows to minimize string-end and shading losses for a system of modules featuring 3T cells.