335 W World Record p Type Monocrystalline Module With 20.6% Efficient PERC Solar Cells
The objective of this study is to optimize module technologies to obtain the lowest price per Watt peak /Wp) ratio and the maximum power output of a flat plate module for a given number of high efficiency solar cells. Using B doped ptype monocrystalline Cz silicon wafers, 500 pieces of full square 156 mm x 156 mm solar cells with a passivated emitter and rear local contacts (PERC) were fabricated with an average efficiency of 20.6% by in house measurement. The module includes half cells for low interconnection losses, as well as a novel light trapping scheme including light capture ribbon connected to the cells and a structured light reflective film between cells combined with an optimized large cell gap. The module using 60 pieces of the 20.6% efficient PERC solar cells has achieved a new world record, with a peak power output of 335.2 Wp in September2014, demonstrating a large cell to module factor, which is defined as Pmmp of module divided by the sum of cell Pmmp. The CTM factor of the champion module is greater than 1.11.
IEEE Journal of Photovoltaics