supported by National Natural Science Foundation of China (Grant No. 50775035);National Hi-tech Research and Development Program of China (863 Program,Grant No. 2006AA050203,Grant No. 2007AA04Z421)
The nonuniform irradiation in the standard photovoltaic(PV) cells causes their relatively high series resistance,which results in a considerably lowered efficiency of PV cells.Currently the concentrator of uniform i...