4 ms·
>Perovskite PV involve organic molecules - you can't make them nor to they work without these organic chemicals. I was under the impression that perovskites we
by thereisnospork 4y ago
>Perovskite PV involve organic molecules - you can't make them nor to they work without these organic chemicals.
I was under the impression that perovskites were fully inorganic? That they may or may not use organic precursors in synthesis is irrelevant.
The interesting question[0] is what is the specific nature and mechanism of the failure reactions in perovskites, so that they may be mitigated or eliminated by alterations to the chemical structure of new perovskites. There is nothing trivially intrinsic about the class of materials that precludes stability.
A good comparative example where a similar problem has been reasonably overcome is with oleds, especially those of higher wavelength (higher energy photons to kick off negative reactions). Yes they might not last as long as an inorganic LED but offer other compelling advantages.
[0]That the researchers appear to be at least attempting to answer
- Thorondor 4y agoThe most frequently discussed perovskite absorbers for solar cells are methylammonium lead trihalides, which are (at least partially) organic compounds.
- thereisnospork 4y agotil. I can see how those might be pretty unstable - halides do like to spin off as free radicals under irradiation, exempting fluorine.
- philipkglass 4y agoThere are mixed organic/inorganic perovskite solar materials as well as fully inorganic ones. The ones with an organic component were developed earlier and they show higher efficiency than all-inorganic ones. It's unfortunate that all-inorganic perovskite materials have not attained the same efficiency, because they do exhibit more stable performance. Here's a Department of Energy overview of organic/inorganic perovskite materials: https://www.energy.gov/eere/solar/perovskite-solar-cells https://www.energy.gov/eere/solar/perovskite-solar-cells Here's a recent advance in all-inorganic perovskite PV cells from a Korean group: https://www.pv-magazine.com/2021/10/22/ambient-processed-inorganic-perovskite-solar-cells-at-19-75-efficiency/ https://www.pv-magazine.com/2021/10/22/ambient-processed-ino...