VOANEWS: Along with other modern technologies, photovoltaics are seeing increased use. A big race is on for a transparent type of these solar cells that may one day cover windows of large buildings, substantially lowering energy bills. Experts, however, say there are still some major obstacles. VOA's George Putic reports. https://www.youtube.com/watch?v=DmAU7ZodDco
VOANEWS: Along with other modern technologies, photovoltaics are seeing increased use. A big race is on for a transparent type of these solar cells that may one day cover windows of large buildings, substantially lowering energy bills. Experts, however, say there are still some major obstacles. VOA's George Putic reports. https://www.youtube.com/watch?v=DmAU7ZodDco
