IMHO EPFL have gone off on a tangent, possibly a rabbit hole in that they are concentrating on a sandwich of Silicon and Perovskites. Indisputably efficient when measured on solar conversion terms but expensive due to the intensity of energy input required to manufacture silicon cells. GSL has concentrated on commercialising stable perovskite cells with cheap connecting conductors and although less efficient initially, will eventually be the turtle that crosses the finishing line as the rabbit runs out of puff. The technology that can pump out a kWh the cheapest will win even if it's not initially the most efficient per square centimetre. And that is either single layer perovskite or a perovskite sandwich.
Don't underestimate the solar farms, truly massive installations are being installed in Australia and worldwide right now but it's still only the thin edge of the wedge as technologies emerge to both store and transport the captured energy around, just as fossil fuels are predominant portable energy today.
When it sinks in that mankind can either burn fossil fuels or die, as evidenced by the explosion of recent worldwide climatic events, the paradigm shift will be as fast as that from candlelight to the light bulb
https://www.independent.co.uk/envir...mate-change-end-century-science-a8095591.html
