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Researchers at the Australian RMIT have developed an electrode prototype, inspired by fern plants, that could be a major boost to the capacity of solar power. The graphene-based prototype also opens a new path to the development of flexible thin film solar capture and storage, advancing the feasibility of self-powering smart phones, laptops, cars and buildings. The RMIT team said the new design drew on nature’s own solution to the challenge of filling a space in the most efficient way possible through intricate self-repeating patterns known as fractals. The leaves of the western swordfern are densely crammed with veins, making them extremely efficient for storing energy and transporting water around the plant, said a leading member of the team. Our electrode is based on these fractal shapes which are self-replicating, like the mini structures within snowflakes and we’ve used this naturally-efficient design to improve solar energy storage at a nano level. The team stated that the immediate application for its design is combining the electrode with supercapacitors, as experiments have shown the prototype can radically increase their storage capacity 30 times more than current capacity limits. Capacity-boosted supercapacitors would offer both long-term reliability and quick-burst energy release - for when someone wants to use solar energy on a cloudy day for example - making them ideal alternatives for solar power storage. Combined with supercapacitors, the fractal-enabled laser-reduced graphene electrodes can hold the stored charge for longer, with minimal leakage. According to the researchers, the most exciting possibility is using this electrode with a solar cell, to provide a total on-chip energy harvesting and storage solution. This can already be achieved with existing solar cells, but these tend to be bulky and rigid. The innovation lies in integrating the prototype with flexible thin film solar technology that is still in its infancy. The team explained: with this flexible electrode prototype we’ve solved the storage part of the challenge, as well as shown how they can work with solar cells without affecting performance. Now the focus needs to be on flexible solar energy, so we can work towards achieving our vision of fully solar-reliant, self-powering electronics.
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Many scientists now think that slowing down global warming isn't enough anymore and that we now need to clear some of the CO2 already in the air. Existing solutions like carbon sequestration aren't ideal, and strategies like vacuuming the sky are still a UN pipe dream. However, scientists at Princeton have come up with an artificial photosynthesis system that could one day turn CO2 into useful things. The idea was to create an electrolysis cell that transforms water and waste CO2 into formic acid, used in airplane de-icing salts and experimental fuel cells. To do that, they used commercial solar panels for energy, carefully matched the current to the cell and stacked the cells -- resulting in a system with two percent efficiency. That may not sound like much, but it easily trumps the previous artificial photosynthesis champ, Panasonic, and is twice as efficient as actual plants. A practical application is still a ways off, though, so in the meantime maybe just go plant a tree.
Solar cell system diagram. The ZIP files include : - EPS 10 compatible vector files, - Adobe illustrator AI CS with live editable text, - HQ 300dpi JPEG image
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University of Washington research pinpoints defects in popular perovskites.
(Phys.org)—Stanford University scientists have built the first solar cell made entirely of carbon, a promising alternative to the expensive materials used in photovoltaic devices today.
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fabricated a MAPbI3 perovskite solar cell based on graphene-CuInS2 quantum dots composite. Specifically, they investigated the performance enhancement of PSCs
synthesis of perovskite solar cells comprising of four component cations (RbCsFAMA) have provided more opportunities for enhancing the
