Modeling low-cost hybrid tandem photovoltaics with power conversion efficiencies exceeding 20%

There is a need for photovoltaic technologies with power conversion efficiencies (PCEs) exceeding 20% that can be produced with a module cost under $0.50 per Watt. Here we propose a solution in the form of an organic-inorganic hybrid tandem photovoltaic (HTPV). We have modeled HTPV devices in current-matched and independently operated subcell configurations to explore the potential for an organic top cell to boost the efficiency of inorganic bottom cells. Our modeling shows that with further development of organic photovoltaic technology, an organic top cell may be added to either a Si or CIGS bottom cell of moderate efficiency to achieve tandem efficiencies exceeding 20%.