LANZHOU, Oct. 29 (Xinhua) -- Chinese researchers have developed a new photovoltaic technique that could improve the efficiency of solar cells and reduce their cost. The new technique uses high-efficiency hole-and-electron-selective layers for both polarities on silicon substrate, which could improve the efficiency of solar cells to 15.1 percent, said Peng Shanglong, head of a research team at Lanzhou University in northwest China's Gansu Province. He added that the new technique would allow the ...
