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Category: solar power

Renewables keep on gaining steam. 😃

Improving the efficiency of solar cells can make a huge difference to the amount of energy produced from the same surface area and the same amount of sunshine, and another world record has been beaten in the push for better yields.

Researchers have now hit an efficiency of 29.15 percent in the perovskite/silicon tandem solar cell category, which is just one of several different types of cells. There are currently a variety of different technologies in use to convert solar energy into electricity.

For this type of panel, the long-term target of more than 30 percent is now tantalisingly within reach. The latest lab tests edge ahead of the maximum 28 percent efficiency that perovskite/silicon cells have managed up to this point.

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Though there are many specific definitions of a microgrid, at its core a microgrid means the ability of a distributed energy resource, typically solar PV and battery energy storage, to both interact with the utility grid and stand alone with no utility. From a technical perspective, what are the key elements to achieve this functionality?

1) Managing the point of interconnection (POI) 2) Power equipment mode shifting.

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A new tool that uses light to map out the electronic structures of crystals could reveal the capabilities of emerging quantum materials and pave the way for advanced energy technologies and quantum computers, according to researchers at the University of Michigan, University of Regensburg and University of Marburg.

A paper on the work is published in Science.

Applications include LED lights, solar cells and artificial photosynthesis.

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A new type of energy-generating synthetic skin could create more affordable prosthetic limbs and robots capable of mimicking the sense of touch, scientists say.

In an early-view paper published in the journal IEEE Transactions on Robotics, researchers from the University of Glasgow describe how a wrapped in their flexible solar is capable of interacting with objects without using dedicated and expensive .

Instead, the skin puts the array of miniaturized integrated on its soft polymer surface to a clever dual use. The cells generate enough energy to power the micro-actuators which control the hand’s movements, but they also provide the hand with its unique sense of ‘touch’ by measuring the variations in the solar cells’ output.

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Graphene, an atomically thin carbon layer through which electrons can travel virtually unimpeded, has been extensively studied since its first successful isolation more than 15 years ago. Among its many unique properties is the ability to support highly confined electromagnetic waves coupled to oscillations of electronic charge—plasmon polaritons—that have potentially broad applications in nanotechnology, including biosensing, quantum information, and solar energy.

However, in order to support , must be charged by applying a voltage to a nearby metal gate, which greatly increases the size and complexity of nanoscale devices. Columbia University researchers report that they have achieved plasmonically active graphene with record-high charge density without an external gate. They accomplished this by exploiting novel interlayer charge transfer with a two-dimensional electron-acceptor known as α-RuCl3. The study is available now online as an open access article and will appear in the December 9th issue of Nano Letters.

“This work allows us to use graphene as a plasmonic material without metal gates or voltage sources, making it possible to create stand-alone graphene plasmonic structures for the first time” said co-PI James Hone, Wang Fong-Jen Professor of Mechanical Engineering at Columbia Engineering.

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Austrian boatbuilder Silent Yachts has already gained a fair bit of attention with its solar electric catamarans. Its just-announced latest model should continue that trend, as it’s the result of a partnership with automakers Volkswagen and Cupra.

According to Silent Yachts, the as-yet unnamed solar-powered electric catamaran will feature the company’s own photovoltaic system. This will be used to charge batteries that will in turn provide power to the yacht’s onboard electronics, and to its electric propulsion system.

That system will be based around Volkswagen’s modular electric drive matrix (MEB) platform. MEB was initially designed as an optimized means of delivering power from a bank of chassis-integrated batteries to a motor on a car’s rear axle – the platform can also be set up for four-wheel-drive. Volkswagen has since made the technology available for third-party applications, hence its upcoming use for spinning the catamaran’s propellers.

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Australia seems to be one of the leaders in the transition to renewables.

Australia has reached its highest position ever on the Ernst & Young (EY) Renewable Energy Country Attractiveness Index, jumping to third place for the first time thanks to a big boost from its green hydrogen and solar energy export plans.

In the latest edition of the biannual RECAI, which ranks the world’s top 40 countries based on investment in renewable energy, EY moved Australia up one spot from number four in the May rankings, putting it behind only China and the US, in that order.

The report notes a global “surge of interest” in green hydrogen in 2020, from policymakers and investors alike, highlighting its potential to support decarbonisation – particularly for countries with limited potential for their own renewable generation capacity.

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When light falls on a material, such as a green leaf or the retina, certain molecules transport energy and charge. This ultimately leads to the separation of charges and the generation of electricity. Molecular funnels, so-called conical intersections, ensure that this transport is highly efficient and directed.

An international team of physicists has now observed that such conical intersections also ensure a directed energy transport between neighboring of a nanomaterial. Theoretical simulations have confirmed the . Until now, scientists had observed this phenomenon only within one molecule. In the long term, the results could help to develop more efficient nanomaterials for organic solar cells, for example. The study, led by Antonietta De Sio, University of Oldenburg, and Thomas Frauenheim, University of Bremen, Germany, was published in the current issue of the scientific journal Nature Nanotechnology.

Photochemical processes play a major role in nature and in technology: When molecules absorb light, their electrons transit to an excited state. This transition triggers extremely fast molecular switching processes. In the human eye, for example, the molecule rhodopsin rotates in a certain way after absorbing light and thus ultimately triggers an electrical signal—the most elementary step in the visual process.

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Solar power stations in space that beam ‘emission-free electricity’ down to Earth could soon be a reality thanks to a UK government funded project.

Above the Earth there are no clouds and no day or night that could obstruct the sun’s ray – making a space solar station a constant zero carbon power source.

The UK government commissioned new research into the concept of space-based solar power (SBSP) stations as a way to meet the Earth’s growing energy needs.

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