New solar panel tech could trap heat for 1,000 times longer to beat a long-standing limit in energy production
A new discovery about tin-based solar panels means the long-standing 33% limit could eventually be breached.
Researchers from the University of Groningen in the Netherlands have developed a new solar panel material that could potentially surpass the long-standing 33% energy conversion rate limit. The secret behind this improvement lies in the material's ability to trap heat for an unprecedented 1,000 times longer than before. Solar panels operate by converting photons from sunlight into electricity using electrons.
However, high-energy photons create super-charged electrons, or hot electrons, that lose their energy as heat before they can be harvested.
The team's analysis revealed that two specific physics effects are responsible for this remarkable heat retention - a hot phonon bottleneck and the Burstein-Moss effect. The hot phonon bottleneck traps heat by causing electrons to reabsorb thermal energy rapidly, while the Burstein-Moss effect creates a queue-like situation where newly cooled hot electrons must wait to release their energy, preventing other hot electrons from losing heat quickly.
This combined effect allows the solar panels to maintain high energy output for extended periods, potentially pushing the conversion rate past the critical 33% threshold. The researchers' findings, published in the ACS Energy Letters journal, provide a clear understanding of this innovative solar panel material's properties, paving the way for its possible commercialization.
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