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Cr 3+ /Yb 3+ -codoped glasses were studied as broadband down shifting materials for improving solar cells’ efficiency. We observed Föster resonance energy transfers (FRET) from Cr 3+ : 4 T 2g to Yb 3+ : 2 F 5/2 . The ET efficiency was up to 84 %, and the measured quantum yield (QY) reached 21.51 %. The glass can convert solar photons...
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