Luminescence enhancement by energy transfer in melamine-Y2O3:Tb3+ nanohybrids

作者: Luigi Stagi , Daniele Chiriu , Andrea Ardu , Carla Cannas , Carlo M. Carbonaro

DOI: 10.1063/1.4931678

关键词: MelamineRaman scatteringRaman spectroscopyAnalytical chemistryLuminescenceTerbiumHydrothermal synthesisMaterials sciencePhotoluminescencePhotoluminescence excitation

摘要: The phenomenon of luminescence enhancement was studied in melamine-Y2O3:Tb hybrids. Terbium doped Y2O3 mesoporous nanowires were synthesized by hydrothermal method. X-ray diffraction patterns and Raman scattering spectra testified the realization a cubic crystal phase. Organic-inorganic melamine-Y2O3:Tb3+ hybrid system successfully obtained vapour deposition Vibration active modes organic counterpart investigated order to verify achievement system. Photoluminescence excitation photoluminescence spectra, preformed region between 250 350 nm, suggest strong interaction among melamine ions. In particular, remarkable improvement 5D4→ FJ Rare Earth emission (at about 542 nm) 102 fold observed attributed an efficient organic-Tb energy transfer. transfer mechanism use time resolved measurements. lifetime undergoes significant decrease when ...

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