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The efficiency of solar cells may be improved by better exploitation of the solar radiation managing the photons coming from the solar spectrum to better fit the absorption band of the employed solar cells. This can be done by inserting in the front or rear of the solar cell an optically active layer doped with rare earth ions which acts as down-converter or up-converter. This is just one of the possibilities...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.