3 ms·
"Average temperature" doesn't mean much. Deterioration is concentrated in the periods of peak temperature, non-linearly. It makes it hard to express practical l
by ncmncm 4y ago
"Average temperature" doesn't mean much. Deterioration is concentrated in the periods of peak temperature, non-linearly. It makes it hard to express practical longevity with averages. You might be able to say something like, "it should last X years if it stays below T2, and spends no more than Y hours between T1 and T2." Then, actual lifetime at T2 provides an upper bound on that.
They don't say in the article, but perovskites are amenable to stacking with different wavelength capture characteristics, so can be built to capture above 40% of incident solar energy. That, and being radically cheaper to produce than Si cells, means there is great interest in this result.
- smaddox 4y agoDeterioration tends to be roughly linear on an Arrhenius scale, which is basically the scale which is exponential on the inverse temperature. This is because deterioration tends to be roughly linear on the activation energy of defects.
- ncmncm 4y agoWhat that means in practice is that hardly anything happens below a certain temperature, but it goes all to hell in a flash, above that. The "certain temperature" for any particular sample depends on what you consider "a flash". You would be pretty peeved if your solar panel went all to hell in a year, so you calibrate accordingly.
- nicoburns 4y agoI guess these could be particularly well suited to colder / less sunny climates. Which could be a very good thing, given that in sunny climates existing technologies are already pretty much good enough.