30 Sep '12, 10am

New Efficiency Record for Photovoltaic Cells Set, Jump in Efficiency Thanks to Heterojunction Technology

New Efficiency Record for Photovoltaic Cells Set, Jump in Efficiency Thanks to Heterojunction Technology

In order for this to work efficiently, the interface that’s between the two different types of silicon needs to be optimized. “Antoine Descoeudres managed to achieve this feat together with Stephaan DeWolf and their colleagues. They chose the commonest — and therefore cheapest — crystalline cell (called ‘p-doped silicon’), took care of its preparation and improved the process of application of amorphous silicon. They obtained a 21.4% conversion efficiency, which had never been achieved before with such type of substrates: nowadays, the best quality monocrystalline cells only attain an energy conversion efficiency of 18-19% at best. In addition, the measured open-circuit voltage was 726 mV, which constitutes a first-time accomplishment as well. Last but not least, they broke the 22% efficiency barrier on a less common substrate.”

Full article: http://cleantechnica.com/2012/09/30/new-efficiency-record...

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