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Abstract
Al2O3:Cr3+ nanocrystals have been developed as spectral converters for improving silicon cell photovoltaic conversion efficiency. In the Al2O3 lattice, Cr3+ ions act as broadband spectral acceptors by absorbing UV–vis (320–670nm) photons, which are effectively converted into the strong red emission centered at around 696nm, indicating Al2O3:Cr3+ can be a good material for overcoming the so-called spectral mismatch in the silicon solar cell. The Al2O3:Cr3+ nanocrystals are successfully introduced into tellurite glass to form transparent composites with good optical performance which can be characterized by photoluminescence (PL) spectra. These tellurite glass composites open a brand new field for the research of improving silicon solar cell photovoltaic conversion efficiency.
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