I don ' t like saying stupidity but most of what you say is on point . Although a fair few people from Oceania have replied to this reporting map changes , so I ' m more willing to believe that one now Also I think most people have heard of Mongolia ? <| sep |> So , technology is easily scaled to mass production . Perovskites are cool because they can be synthesized in solution as is , meaning you can paint or pour them onto a surface to make your solar cell . The problem comes with people blindly searching . Different solvents have shown promise , but people realize they need a blend of sorts and are guessing as to what blend that is . People are worried about the lead and think tin might be better , but tin has significantly worse PCE photovoltaic conversion efficiency and further is highly unstable . The exact blend of halides to use is unknown , and people are guessing at that also . Finally , the cation changes things . Common cations are things like Methylammonium and Cesium , but once again recent work has found that mixtures work best . Unless someone blindly finds the perfect mixture , or someone starts paying attention to the science which is what my thesis is on , it ' ll likely take 10 to 15 years before it ' s in production . My hopes are that more people start paying attention to WHY different components behave the way they do . With better fundamentals , perovskite solar cells would be cheap and on the market in 510 years . All guessed timetables though . Finally , what ' ll likely be the final perovskite used is something along the lines of Pbx Sny Cln Im MAr Csk . I highly doubt you can fully transition to Sn and have an efficient solar cell . Further , I posted above but apparently the tin derivatives will kill you faster , even if the lead ones will mess up your mind .