quantum dot Archives – The Green Optimistic

Hugely-Efficient LEDs Now Use Quantum Dots

Arsenij Percov — Sat, 14 Jul 2018 20:27:31 +0000

Global warming and pollution are already impacting our lives. There are millions of deaths every year that are caused by them. For that reason, researchers from all over the world are looking for ways to make everything around us more energy efficient and use renewable resources. By implementing these strategies, we can reduce energy usage […]

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Quantum Dots Boost Solar Cells Efficiency

Mila Luleva — Sat, 27 Oct 2012 19:57:03 +0000

New technologies emerge every day, and it gets even more exciting when they really benefit our society. One of these inventions is the new solar energy cells that have more than 100% external quantum efficiency (EQE) for photons in the solar range, while every absorbed blue photon can produce 30% more current. EQE measures how […]

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Usable Quantum Dot Solar Cells Finally Produced at NREL

Ovidiu Sandru — Tue, 20 Dec 2011 14:33:22 +0000

A new type of solar cell developed by a team of researchers from the National Renewable Energy Laboratory in Golden, Colorado, is able to harvest the energy that photovoltaic cells usually lose as heat. Although the efficiency is for now only 5 percent, the process could be improved in the future. The researchers led by […]

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New Quantum Dot-Enabled Solar Cells Doubling Output Current With Same Lighting Conditions

Ovidiu Sandru — Mon, 18 Oct 2010 14:05:28 +0000

Cost-efficient and energy-efficient solar cells could be right around the corner. These so-called "third-generation" photovoltaics begin to emerge nowadays and dismiss a theory stated in 1961 by William Shockley and Hans Queisser, who showed that there is a theoretical 31 percent limitation in what regards the maximum efficiency for a single solar cell.

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New MIT Thermoelectric Device Pushes Efficiency to Its Theoretical Limit

Ovidiu Sandru — Thu, 19 Nov 2009 14:45:05 +0000

The Carnot Limit, calculated in the 19th century, demonstrates and sets the maximum efficiency that any device can achieve in converting heat into work. Theoretically and practically, you can't go over that limit. So, the devices constructed up to now only get a tenth of Carnot's limit.

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