| 초록 |
We have suggested organic-inorganic hybrid polyhedral oligomeric silsequioxane (POSS) type monomer ligand 2,6-pyridinediamine-bis-propanylheptaisobutyl POSS (PDC-POSS) and synthesized of rare earth (RE = Eu3+) doped hybrid complex PDC-POSS phosphors. Rare earth doped PDC-POSS were successfully synthesized of molecular precursor prepared from PDC-POSS complex from the FT-IR spectra. The excitation at 288 nm ultraviolet light, strong visible emission was detected from the RE3+-doped PDC-POSS. XPS was used to prove that the substitution and doping of rare earth ions in PDC-POSS material proved that the oxidation state of rare earth ions was +3. The origin of the red emission is attributed to the crystal field transition from the 5d energy level of the RE3+ ion to the 4f ground state. PL decay time results suggest that the photoluminescence properties were quenched in relation to the rare earth concentration Eu3+ ions. As the amount of 0.25 mol% ions added increased, when the amount of rare earth ions increases, the distance between the activator ions in the parent body becomes closer and exchange interaction between ions, It is considered as concentration quenchingSolution-based coating of PDC-POSS:RE3+ phosphors on various objects showed the excellent transparency of the phosphor thin film having strong color emission, which can be recognized by naked eyes. The hiding under usual condition and easy identification ability of PDC-POSS:RE3+ phosphors indicated feasibility of RE3+-doped PDC-POSS as anti-counterfeiting inks and flexible composite applications. |
