https://cleantechnica.com/2018/04/16/more-good-news-about-coal-killing-perovskite-solar-cells/
As for when you can get your hands on that low-cost thin film solar cell, that’s a good question. It doesn’t look like that will take forever, though. Panasonic is a partner in the consortium along with the “disruptive” renewable energy company Greatcell Solar Limitedand the Russia-based solar business incubator Solartek.