Breaking Solar Power News: Holy Quantum Dots Batman!
…. That’s more than doubling the efficiency, which amounts to a whole lot more energy.
According to Xiaoyang Zhu, professor of chemistry and director of the Center for Materials Chemistry, There are a few steps needed to create what I call this ‘ultimate solar cell,’ . First, the cooling rate of hot electrons needs to be slowed down. Second, we need to be able to grab those hot electrons and use them quickly before they lose all of their energy. This is where quantum dots come in, it has been shown that hot electrons can be slowed down in semiconductor nano crystals. So that’s the first step, for the second, how to take those hot electrons out, Zhu’s team has discovered that they can be transferred from photo-excited lead selenide nanocrystals to an electron conductor made of widely used titanium dioxide.
So in a nutshell the sunlight comes in and the higher energy hot electrons are grabbed and slowed down by lead selenide nanocrystals (quantum dots), and transferred to an electron conductor, which allows the…
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Breaking Solar Power News: Holy Quantum Dots Batman!
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