Jeehwan Kim, Stephen W. Bedell, et al.
ECS Transactions
Thin-film solar cells made with amorphous silicon (a-Si) or organic semiconductors are considered as promising renewable energy sources due to their low manufacturing cost and light weight. However, the efficiency of single-junction a-Si or organic solar cells is typically <10%, insufficient for achieving grid parity. Here we demonstrate an efficient double-junction photovoltaic cell by employing an a-Si film as a front sub-cell and a low band gap polymer blend film as a back cell on planar glass substrates. Monolithic integration of 6.0% efficienct a-Si and 7.5% efficient polymer blend solar cells results in a power conversion efficiency of 10.5%. Such high-efficiency thin-film tandem cells can be achieved by optical management and interface engineering of fully optimized high-performance front and back cells without sacrificing photovoltaic performance in both cells.
Jeehwan Kim, Stephen W. Bedell, et al.
ECS Transactions
Osama Tobail, Jeehwan Kim, et al.
THETA 2010
Jeehwan Kim, Can Bayram, et al.
Nature Communications
Jeehwan Kim, Daniel Inns, et al.
Journal of Applied Physics