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- W2034602980 abstract "Photoluminescence (PL) properties of SiO2 films containing Si nanocrystals (nc-Si) and Nd3+(Tm3+) were studied. The average size of nc-Si was changed in a wide range in order to tune the exciton energy of nc-Si to the energy separations between the discrete electronic states of Nd3+(Tm3+). At room temperature, PL from the recombination of excitons confined in nc-Si and the intra-4f shell transition of Nd3+(Tm3+) were observed simultaneously. The intensities of Nd3+ and Tm3+ PL were found to depend strongly on the size of nc-Si. These strong size-dependence suggests that nc-Si which are smaller than a threshold size can efficiently excite Nd3+(Tm3+). We also studied the temperature dependence for the sample with Tm3+. At low temperature, PL spectra of the nc-Si was strongly modified. This modification gives the spectroscopic evidence of the resonant energy transfer to the third excited states of Tm3+." @default.
- W2034602980 created "2016-06-24" @default.
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- W2034602980 date "2002-03-01" @default.
- W2034602980 modified "2023-10-09" @default.
- W2034602980 title "Excitation of Nd3+ and Tm3+ by the energy transfer from Si nanocrystals" @default.
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- W2034602980 doi "https://doi.org/10.1016/s1386-9477(02)00297-7" @default.
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