Indexed from the September 29 newsletter. Linked-source claims have not been independently verified.
Development
Tin perovskites reportedly slow electron cooling
The reported material property is presented as a potential efficiency route, not a finished energy technology.
Claim
The issue reports tin perovskites slowing hot-electron cooling by a factor of 1,000, presented as a possible path past a 33% solar-efficiency limit rather than a demonstrated commercial efficiency.
Reported metric: 1,000x; 33% limit
Reporting date: (not necessarily the event date)
Sources
Attribution and reporting linked by this record; links do not imply independent verification.
- Welcome to September 29, 2026 (theinnermostloop.substack.com)
- Source linked by the September 29 issue (interestingengineering.com)
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