Multi-color fluorescence in rare earth acetylacetonate hydrate doped poly methyl methacrylate

• Published in: Optics communications Vol. 311; pp. 111 - 116
• Main Authors: Zhang, Y.Y., Shen, L.F., Pun, E.Y.B., Chen, B.J., Lin, H.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2013
• Subjects: Devices; Europium; Fluorescence; Hydrates; Optoelectronic devices; Photoluminescence; Poly methyl methacrylate (PMMA); Polymethyl methacrylates; Rare earth acetylacetonate hydrate; Rare earth metals; Terbium; Variable fluorescence color; Rare earth acetylacetonate hydrate; Variable fluorescence color; Poly methyl methacrylate (PMMA); Photoluminescence
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/j.optcom.2013.08.045

Europium and terbium acetylacetonate hydrates were doped into poly methyl methacrylate (PMMA). Efficient purplish-red and green fluorescence was obtained from europium acetylacetonate hydrates (EAH) and terbium acetylacetonate hydrates (TAH) doped PMMA respectively. Judd–Ofelt parameters Ω2 (19.73×10−20cm2) and Ω4 (2.19×10−20cm2) indicate a high inversion asymmetric and strong covalent environment in PMMA. The maximum stimulated emission cross-sections for the 5D0→7FJ (J=1, 2 and 4) transitions in EAH doped PMMA were calculated to be 0.38×10−21, 4.90×10−21 and 0.36×10−21cm2, respectively. Variable fluorescence color can be efficiently achieved from the cooperation of three fluorescence colors offered by red (Eu3+), green (Tb3+) and blue (ligand) in EAH/TAH codoped PMMA by adjusting the excitation wavelength. These results indicate that PMMA is an effective photoluminescence co-sensitizer and PMMA doped with rare earth acetylacetonate hydrates is a promising candidate for a series of optoelectronic functional devices.