China’s Solar Dominance Faces New Rival: An Ultrathin Film

TOKYO—China’s near-monopoly on the solar-energy market has prompted the U.S. and allies to step up the seek for workarounds. Engineers imagine they’ve discovered one in a sort of photo voltaic cell that appears and seems like digital camera movie.

Japan is pushing the know-how with subsidies and different help, an indication of how renewable power, alongside different high-tech fields reminiscent of semiconductors, has develop into a geopolitical soccer.