Ah, that's what it was for me.
Roll-to-roll fabricated perovskite solar cells under ambient room conditions: https://news.ycombinator.com/item?id=39998740
Perovskite solar cells, ah yes, the ones that degrade rapidly in sunlight. Good thing they are typically safely tucked away in labs with controlled lighting.
Perovskite solar cells, ah yes, the ones that degrade rapidly in sunlight. Good thing they are typically safely tucked away in labs with controlled lighting.