New record efficiency for flexible perovskite solar cells

Does it matter that perovskite is now 20.7% efficient? Who are they trying to fool?

How many 1000 square meters of land do you need to replace a typical nuclear power plant? 

How often do you need to clean solar power panels to maintain high efficiency?
And so on ..

New record efficiency for flexible perovskite solar cells | Research | Chemistry World (behind paywall) Porous planar electron transport layer boosts power conversion efficiency in flexible perovskite solar cells to 20.7%