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Excitation spectra of ( and transition of ) and emission spectrum (solid line, and transition of ) of .
Emission spectra of , . (a) Emission spectra of ; (b) emission spectra of .
(a) Decay lifetime curves of the transition of at 647 nm fitted by the generalization of the Yokota–Tanimoto model; (b) schematic energy level diagrams for showing the concept of NIR QC.
Decay lifetimes of the and the plotted as a function of concentration.
The possible mechanism of the application of QC phosphors in Si-based solar cells. (: Photon rips into the solar cell. : The e-h pair is produced. : Energy of excited electron loses by thermal relaxation. : Electric current occurs.)
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