4 ms·

As with all these high-efficiency things, different layers are tuned to take up different wavelengths. Shortest on top, longer underneath.

• Schroedingersat 4y ago
  Yes, but is anyone seriously considering multi junction panels for stationary applications? When there is an abundance of free rooftops and parking lots and plenty of low quality rural land for under 20 cents per square metre it doesn't seem to make a lot of sense to pay over double for less than double efficiency.
  • ncmncm 4y ago
    For the case of perovskite cells, adding layers does not seem to multiply the production cost. Certain uses place a premium on areal efficiency, notably aerospace. But anybody who has maxed out their own collection area, whether a roof or reservoir, can get more revenue from using better cells. And, the more of that that is done, the faster their price falls. We may reasonably expect the price of multilayer perovskites to drop below cost of silicon panels. Sooner is better, which is driven by maxed-out demand.
    • Schroedingersat 4y ago
      > For the case of perovskite cells, adding layers does not seem to multiply the production cost. I guess this makes sense given the hard bit is the substrate. This would be good for everyone as second hand silicon cells for 10-30c/W will open up a bunch of new uses.