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How A Flexible And Efficient Solar Coating Could Power Your Phone And Other Devices Without Losing Performance
When we talk about solar energy, the image that usually comes to mind is of vast areas covered by black panels, made up of silicon semiconductor solar cells. These panels have been instrumental in reducing the cost of solar energy by about 90% since 2010, providing an essential renewable source.
However, there is more to the possibilities of solar energy than simply installing massive solar farms or panels on rooftops.
Innovation In Materials: Perovskites And Solar Efficiency
A recent study revealed that researchers at the University of Oxford developed a new type of material capable of absorbing light without relying on the traditional and rigid silicon photovoltaics that currently dominate. This technological advancement utilizes a “multi-junction approach,” which involves layering several perovskite layers, a light-absorbing material, into a single solar cell.
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Brazilian scientists are simultaneously advancing two research projects on clean hydrogen and driving solutions that could transform the energy matrix, enhance industrial competitiveness, and accelerate large-scale emission reduction targets.
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Advancement in renewable energy: A R$ 150 million project launched by Petrobras and Finep aims to create state-of-the-art electrolyzers for green hydrogen, strengthening national research and preparing Brazil to compete in a billion-dollar energy market.
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Illiterate or semi-literate grandmothers were trained to repair solar systems, open rural workshops, and light up homes that still depended on kerosene.
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The world has bet on green hydrogen as the fuel of the future, but now faces the side effect: producing 1 kilogram requires about 9 liters of ultrapure water, and the largest projects on the planet are precisely in the driest regions of the Earth, where water is already scarce for people.
Testing And Impressive Efficiency Results
The National Institute of Advanced Industrial Science and Technology of Japan (AIST), renowned for its contributions in calibration, standards, and photovoltaic measurements, confirmed that this new solar cell achieved an impressive efficiency of 27%.
This means that 27% of the solar light that hits the cell is converted into usable energy, a considerable milestone, especially considering that this efficiency rate is usually only achieved under ideal laboratory conditions. Researchers indicate that this is just the beginning of even more promising possibilities.
The greatest advantage of this new technology, beyond high efficiency, is its flexibility. With a thickness of just over one micron — about 150 times thinner than a traditional silicon wafer — this material acts more like a coating that can be applied to numerous surfaces, from backpacks and vehicles to cell phones. This significantly expands the potential for solar energy capture, potentially reducing reliance on less sustainable energy sources.
Despite the promises, innovation with perovskites faces challenges, such as comparatively lower durability than other solar technologies. However, advancements have been made to overcome these obstacles. Oxford PV, a spin-off company from the University of Oxford established in 2010, is at the forefront of these efforts, having started mass production of these hybrid solar cells in 2023 through a pilot production line.
Henry Snaith, co-founder and chief scientist of Oxford PV, highlighted the transformative potential of these advancements. “The recent innovations in materials and solar techniques demonstrated in our labs have the potential to underpin a new industry. This could generate solar energy in a more sustainable and cost-effective way, integrating it into buildings, vehicles, and existing objects,” said Snaith in a statement.
These innovations do not suggest that we should slow down the pace of installing conventional solar panels, especially considering the urgency in combating climate change. However, the possibility of covering more surfaces with solar cells that efficiently harness free solar energy could benefit everyone, marking a significant step towards a more sustainable and energy-efficient future.
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