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Indium gallium arsenide and gallium arsenide are compound semiconductors that are far too expensive for use in mass market panels. They are used as cells or com
by philipkglass 4y ago
Indium gallium arsenide and gallium arsenide are compound semiconductors that are far too expensive for use in mass market panels. They are used as cells or components of multi-junction cells for satellites and a few other high value applications. Commercial silicon cells are doped with phosphorus and boron or gallium.
On further reading I find that you are correct about RoHS exemptions for lead in solar modules:
https://www.pv-magazine.com/2019/12/07/the-weekend-read-taking-the-lead/ https://www.pv-magazine.com/2019/12/07/the-weekend-read-taki...
I appreciate the correction.
- tedk-42 4y agoThis back and forth made my day :)
- lightedman 4y agoCommercial cells doped with boron are meant for use in low-light applications due to higher efficiencies in lower/diffuse light, and are not very suited to direct-sunlight applications due to the tradeoff. Indium and Gallium-doped single-crystal silicon still wins in efficiency. Phosphorous I have not seen in any of the roughly 5 million cells I've handled as part of QC. I've heard of nanoparticles of phosphorous helping perovskite-based cells, but that's about it. I've never handled one in commercial production.