Yang added that there has been intense world-wide interest in so-called polymer solar cells.

ENGADGET: UCLA creates transparent solar cell, dreams of current generating windows

Sun Yang also added to China's growing gold tally with a win in the men's 1500-meter freestyle.

CNN: Phelps nets gold in last race; British hosts bank six

His backcourt mate Peyton Siva, the yin to Smith's yang, added 16 points of his own and keyed the sequence that all but punched Louisville's ticket to its second straight national semifinal.

WSJ: Louisville Overcomes Duke, Injury to Move to Final Four