New double-pane quantum dot solar windows generate power with better efficiency

January 3, 2018 by  
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Researchers at an American national laboratory have now employed quantum dots for double-pane solar windows that offer shading, insulation, and, of course, generate energy – with greater efficiency. The Los Alamos National Laboratory team drew on a new window architecture utilizing two layers of low-priced quantum dots, tuned to take in distinct parts of the solar spectrum. The double-pane windows were equipped with manganese-doped quantum dots, absorbing blue and ultraviolet, on the surface of the front glass pane, and copper indium selenide quantum dots, absorbing the rest of the spectrum, on the back pane’s surface. Once light is absorbed, dots re-emit it at a longer wavelength. Total internal reflection guides the light to the edges, where it can be gathered and turned into power by solar cells in the window frame. Related: National laboratory scales up quantum-dot solar windows that can power entire buildings Solar-spectrum splitting – in which higher- and lower-energy solar photons can be processed separately – is key to the research, according to Los Alamos. And the dots in the front layer are essentially reabsorption free, which the laboratory said the team accomplished by incorporating into quantum dots manganese ions “that serve as highly emissive impurities. Light absorbed by the quantum dots activates these impurities. Following activation, the manganese ions emit light at energies below the quantum-dot absorption onset. This trick allows for almost complete elimination of losses due to self-absorption by the quantum dots.” The journal Nature Photonics published the research online on New Year’s Day. Per the article’s abstract, the researchers’ prototype “exhibits a high optical quantum efficiency of 6.4 percent for sunlight illumination and solar-to-electrical power conversion efficiency of 3.1 percent. The efficiency gains due to the tandem architecture over single-layer devices quickly increases with increasing LSC [luminescent solar concentrator] size and can reach more than 100 percent in structures with window sizes of more than 2,500 centimeters squared.” Double-pane quantum dot solar window research could lower the cost of solar power , according to lead researcher Victor Klimov, who said in a statement , “Because of the strong performance we can achieve with low-cost, solution processable materials, these quantum-dot-based double-pane windows and even more complex luminescent solar concentrators offer a new way to bring down the cost of solar electricity.” Via Los Alamos National Laboratory Images via Los Alamos National Laboratory Twitter and Depositphotos

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New double-pane quantum dot solar windows generate power with better efficiency

MIT Scientists Create a More Efficient Solar Cell by Using Quantum Dots and Nanowires

March 25, 2013 by  
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Photo via Shutterstock A team of researchers at MIT have developed a more efficient photovoltaic solar cell using particles known as quantum dots . The benefit of using quantum dots is that they can be produced cheaply, and the solar cells can be manufactured at room temperature, unlike silicon and other PV materials, which require high-temperature processing. Using a new technique, the scientists embedded the quantum dots in a ‘forest of nanowires,’ which will help the team to achieve higher efficiency ratios. Read the rest of MIT Scientists Create a More Efficient Solar Cell by Using Quantum Dots and Nanowires Permalink | Add to del.icio.us | digg Post tags: “solar energy” , massachusetts institute of technology , MIT , nanowires , photovoltaic , qauntum dot solar cell , quantum dots , Solar Cell , solar efficiency , solar panel , Solar Power

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MIT Scientists Create a More Efficient Solar Cell by Using Quantum Dots and Nanowires

Unlock an Interior Design Career with The Sheffield School’s Convenient Home Study Programs

March 25, 2013 by  
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Image from Shutterstock As an Inhabitat editor, I’m asked all kinds of questions about green architecture and sustainable interior design , but the one I probably hear the most is, “How’d you get your job?” Based on those inquiries as well as the input I receive from my friends and family, it’s plain to see that many professionals in non-creative roles spend their days pretending to do work behind cubicle walls while secretly pursuing their true passions on Pinterest (I’m not judging because I totally do it too). If that sounds like you, you may have daydreamed about going back to school for interior design , but decided that it just wasn’t financially feasible to quit your current job or put in the time commitment. Luckily, it turns out that nowadays you can start steering yourself towards the creative career you want without giving up your day job. By studying at New York City’s premier home-study interior design school , The Sheffield School , you can start courses whenever you like and move at your own pace towards a certificate of completion. You’ll learn the basic principles you need to get started, and the best part is that it’s not nearly as risky or costly as quitting your job cold turkey and matriculating into a college design program. Read the rest of Unlock an Interior Design Career with The Sheffield School’s Convenient Home Study Programs Permalink | Add to del.icio.us | digg Post tags: adult education , creative courses , feng shui , how to be a wedding planner , how to become an interior designer , interior decorating , interior design , interior design courses , jewelry design , learn to be a wedding planner , sheffield , sheffield school , sheffield.edu , The Sheffield School , Wedding and Event Planning , wedding planner , wedding planning

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Unlock an Interior Design Career with The Sheffield School’s Convenient Home Study Programs

Nanodiamonds are Forever and They Can Reduce Toxic Metals, Too

January 23, 2010 by  
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Nano-scale medical research is promising some amazing breakthroughs in diagnosis and drug delivery techniques.  In spectroscopy, for example, tiny crystals called qdots (quantum dots, also called nanocrystals) can be used to study cells at the molecular level. It’s an emerging field that’s ready to explode into mainstream medicine – but there’s a catch

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Nanodiamonds are Forever and They Can Reduce Toxic Metals, Too

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