A Manufacturable, Non-plated, Non-Ag Metallization based 20.44 Efficient, 243 cm~2 Area, Back Contacted Solar Cell on 40 μm Thick Mono-Crystalline Silicon

摘要

We present a disruptive mono-crystalline silicon based solar photovoltaic technology which dramatically reduces cost, while providing very high efficiency, enhanced energy yield, and enabling capability for lightweight flexible modules with reduced BOS costs. A 20.44% efficiency cell on ～40 μm monocrystalline silicon absorber is presented. The full-square cell substrate size is 243 cm~2. The cell does not use expensive Ag matellization or Cu plating metallization. It is manufactured using an inexpensive Al metallization structure. The technology enables flexible cells and modules as well as the nimbleness to scale the cell voltage and current while delivering the same high output power. Scaled down current and scaled up voltage compared to conventaional silicon cells enables substantially reduced ohmic power dissipation loss in modules and installed PV systems, while paving the way for larger substrate sizes and inexpensive embedded power electronics integrated within the cells and modules.