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Multicolor luminescent rare-earth ion-doped Y2O3 nanocrystals(NCs) were prepared by a solvethermal method.The as-synthesized NCs yielded nanosheets,nanowires(NWs) and nanorods(NRs) with the increase of alkali(NaOH) in oleic acid system.Moreover,Y2O3 nanowires with controllable size have also been obtained.After sintering,the PL intensity of Y2O3:Ln 3+ nanocrystals increased with the changed morphology of the precursor,that is,Y(OH) 3 nanocrystals.Both downconversion(red emission for Y2O3:Eu 3+ and green emission for Y2O3:Tb 3+) and upconversion(red emission for Y2O3:Yb/Er 3+) luminescence of the as-prepared nanocrystals have been demonstrated in this work.We also found that the PL intensity of Y2O3:Ln 3+ NCs dispersed in polar solvent was stronger than that in nonpolar solvent.Their up/downconversion fluorescence and controllable morphology might promise further fundamental research and biochemistry such as nanoscale optoelectronics,nanolasers,and ultrasensitive multicolor biolables.
Multicolor luminescent rare-earth ion-doped Y2O3 nanocrystals (NCs) were prepared by a solvethermal method.The as-synthesized NCs yielded nanosheets, nanowires (NWs) and nanorods (NRs) with the increase of alkali (NaOH) in oleic acid system. Y2O3 nanowires with controllable size have also been obtained. After sintering, the PL intensity of Y2O3: Ln 3+ nanocrystals increased with the changed morphology of the precursor, that is, Y (OH) 3 nanocrystals. Both downconversion (red emission for Y2O3: Eu 3+ and green emission for Y 2 O 3: Tb 3+) and upconversion (red emission for Y 2 O 3: Yb / Er 3+) luminescence of the as-prepared nanocrystals have been demonstrated in this work. of Y2O3: Ln 3+ NCs dispersed in polar solvent was stronger than that in nonpolar solvent. Their up / downconversion fluorescence and controllable morphology might promise further fundamental research and biochemistry such as nanoscale optoelectronics, nanolasers, and ultrasensitive multicolor biolables.