Enhancement of photoluminescence in various Eu x Re(1−x)TTA3Phen (Re = Y, Tb) complexes molecularly doped in PMMA

Composition and Fluorescence of Gadolinium (III) Acetylacetonate Derivatives by Solvothermal Method

“…Figure 7 shows the UV-v is absorbance of Gd(A-cAc) 3 •3H 2 O and Gd-S-T. For Gd(AcAc) 3 •3H 2 O, only one absorbant peak centered at 294 nm is observed which is attributed to the π-π * transition of β-diketonate ligand [5]. Due to the forbidden of electron transition between ligands and Gd 3+ which has stable electron arrangement, still only one peak is observed for Gd-S-140, but right shifts to 308 nm indicating the π-π * transition of β-diketonate ligand becomes more easier and the conjugation degree Gd with acetylacetone groups is weakened.…”

“…The luminescence intensity of rare earth complexes related to the absorption efficiency of ligands, which is dependent on the ligand molecule with large π-conjugated system. Good solubility of substituted rare earth β-diketonate complexes in common organic solvents highly enhances their applications in the solution processable organic semiconductors and also provides more efficient approach to fabricate OLED devices by solution techniques [4,5]. So the fluorescence of some rare earth β-diketonate complexes were studied and modified to widen their application [6,7].…”

Synthesis and characterization of Y(1‐x)Eu(x)(TTA)3(Phen) organic luminescent thin films

“…Absorption and PL measurements for a thin film of Y (1‐x) Eu (x) (TTA) 3 (Phen) complexes were carried out on a SPECORD 50 spectrophotometer and spectrofluorometer respectively. These complexes have good solvability in basic and acidic solvents . Red OLEDs using these complexes as the emissive layer have been reported previously .…”

Photon Conversion and Radiation Synergism in Eu/Tb Complexes Incorporated Poly Methyl Methacrylate

“…The variation of color coordinates is originated from the superimposed effect of TBA and EBA, indicating that Ln complexes incorporated PMMA are a promising candidate for radiation conversion system and lighting device. Furthermore, intrinsic transition intensities of Eu 3+ increase due to energy migration from Tb 3+ , and the energy transfer process can be further exposed through the excitation behaviors [70,71]. In order to ascertain the occurrence of energy transfer between Tb 3+ and Eu 3+ , the excitation spectra are recorded by monitoring at 610 nm, which corresponds to 5 D 0 → 7 F 2 emission transition of Eu 3+ .…”