Efficient Photon Conversion from Lanthanide Nanocrystals

【作者】 孙聆东；

【机构】 北京大学化学院；

【摘要】 Luminescence from lanthanide nanocrystals,ranged from ultraviolet to visible and even the near infrared,are attractive for a broad field of photon conversion applications.Efficient tailoring of the lanthanide luminescence,i.e.intensity,f-f intra-configurational transition selectivity and lifetime,is of great importance for extended applications.We presented facile and effective strategies to tailor the upconversion emission by engineering the local structure,core/shell structure with precisely tuning the composition of the core and shell of the nanocrystals.Combined with core/shell structure,energy transfer localized in nanodomain benefits to multiphoton upconverting process,and orthogonal excitation and emission integration is achieved on single particle.With upconversion nanoparticles(UCNPs) coupled microcavities,ultralow threshold upconverted lasing ranging from visible to near infrared,with excitation low fluences,was obtained.更多还原

【Abstract】 Luminescence from lanthanide nanocrystals,ranged from ultraviolet to visible and even the near infrared,are attractive for a broad field of photon conversion applications.Efficient tailoring of the lanthanide luminescence,i.e.intensity,f-f intra-configurational transition selectivity and lifetime,is of great importance for extended applications.We presented facile and effective strategies to tailor the upconversion emission by engineering the local structure,core/shell structure with precisely tuning the composition of the core and shell of the nanocrystals.Combined with core/shell structure,energy transfer localized in nanodomain benefits to multiphoton upconverting process,and orthogonal excitation and emission integration is achieved on single particle.With upconversion nanoparticles(UCNPs) coupled microcavities,ultralow threshold upconverted lasing ranging from visible to near infrared,with excitation low fluences,was obtained.更多还原