Fully recyclable solar cells – just add water
February 14, 2025 Richard Musgrove
Swedish researchers have invented a fully-recyclable perovskite solar cell that may provide a solution to the growing problem of solar panel waste.
All renewable technologies have a life span — with solar panels it’s 25 to 30 years — which means our solar waste pile is rapidly becoming mountainous. Just 17 % of solar panel components were recycled in Australia in 2023, specifically the aluminium frames and junction boxes. The remaining 83% (glass, silicon and polymer back sheeting) was shuttled out to landfill. Other countries do better; France’s ROSI was an early starter in what could be a $2b market by 2050.
Linköping University researchersmay have a solution — fully recyclable perovskite solar cells.
These cells are also flexible, transparent and inexpensive — who needs aluminium frames when your PVs are stuck to your windows?
“There is currently no efficient technology to deal with the waste of silicon panels. That’s why old solar panels end up in the landfill,” says coauthor, Xun Xiao, at the Department of Physics, Chemistry and Biology (IFM) at Linköping University (LiU).
“Huge mountains of electronic waste that you can’t do anything with.”
Perovskites used in photovoltaic solar cells are ‘metal-halide perovskites’ — made from organic ions, metals and halogens. Such cells’ active layers are much thinner and cheaper than those of conventional silicon PV and show efficiencies of more than 26%, comparable with silicon PVs (20% – 22%).
But perovskite PVs are not yet produced at scale.
Recyclability is the key.
“We need to take recycling into consideration when developing emerging solar cell technologies,” says Professor Feng Gao, also at IFM at LiU and a co-author. “If we don’t know how to recycle them, maybe we shouldn’t put them on the market at all.”
(Snip-MORE, and they can recycle them!)
Pressing pause: how a unique insect survives Antarctica
February 14, 2025 Ariel Marcy
The inhospitable Antarctic Peninsula hosts only one native insect, and scientists from Japan have just identified an unprecedented combination of adaptations that allow it to thrive in the extreme cold.
The Antarctic midge is a tiny, flightless insect that lives most of its two-year life as a larva, the grub-like stage that follows the egg stage. (Complete metamorphosis in insects includes egg, larva, pupa, and adult stages).
How these larvae overwinter in Antarctica could have implications for cryopreservation technology but, perhaps more pressingly, better understanding of the species’ response to climate change. Previous researchers have suggested that the Antarctic midge be developed as a model organism for survival in extreme and fluctuating temperatures.
The Japanese research team led by Shin Goto of Osaka Metropolitan University studied the unique midge after developing a specialised rearing method, which took them six years to establish.
The team then tracked the growth and physiology of the midge larvae through their natural lifecycle. In a first for science, they documented two distinct forms of dormancy used as seasonal survival adaptations.
In general, dormancy is a state of inactivity, suspended development and reduced metabolism, but insect scientists distinguish between two types: quiescence and diapause.
In the first winter, the Antarctic midge larvae adapted via quiescence, a form of dormancy triggered by external conditions, such as cold temperatures. This means all the midge larvae go dormant at the same time. Quiescence ends when the temperature rises.
(Snip-MORE; it’s fascinating and worth the click. Also not long.)
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