Influences of compositions and ligands on photoluminescent properties of Eu(III) ions in composite europium complex/PMMA systems

Photoluminescence of Alq3‐ and Tb‐activated aluminium–tris(8‐hydroxyquinoline) complex for blue chip‐excited OLEDs

“…In the blended thin film of Alq 3 :PMMA with different concentration ratios, neither annealing nor sublimation at high temperature was carried out, hence the structure of the Alq3 molecule remains the same in the blended thin film as it was in Alq 3 powder, and still we observed a slight blue shift of 4 nm in a blended thin film of 1 wt% concentration and a red shift of 12 nm in a blended thin film of 10 wt% concentration. The observed blue shift of emission may be attributed to cross‐relaxation , whereas the red shift of emission may be attributed to the change from a two‐dimensional (2D) excitation state (surface component) to a three‐dimensional (3D) excitation state (bulk component) .…”

Photoluminescence of Alq3‐ and Tb‐activated aluminium–tris(8‐hydroxyquinoline) complex for blue chip‐excited OLEDs

“…In the blended thin film of Alq 3 :PMMA with different concentration ratios, neither annealing nor sublimation at high temperature was carried out, hence the structure of the Alq3 molecule remains the same in the blended thin film as it was in Alq 3 powder, and still we observed a slight blue shift of 4 nm in a blended thin film of 1 wt% concentration and a red shift of 12 nm in a blended thin film of 10 wt% concentration. The observed blue shift of emission may be attributed to cross‐relaxation , whereas the red shift of emission may be attributed to the change from a two‐dimensional (2D) excitation state (surface component) to a three‐dimensional (3D) excitation state (bulk component) .…”

Sensitization and intra-molecular energy transfer of Eu3+ by Tb3+ in Eu-Tb binuclear complexes/PMMA

“…The positive P value in Table 3 demonstrates that the fluorescence emission of europium ions was greatly sensitized by terbium ions. PMMA, as a matrix to the luminescence complexes, had great effects on the PL properties of Eu 3+ because of the strong coordination interaction between Eu 3+ and C=O group [11] . The interaction between the ligands and PMMA resulted in the formation of different microenvironments around Eu 3+ , which changes with the composition of the composite, as can be seen in Fig.3.…”

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

“…Poly methyl methacrylate (PMMA) exhibits high transparency in the visible spectral region, excellent weather resistance, and high mechanical strength. Moreover, PMMA contains carbonyl groups along with its carbon chain that can be interacted with Ln complexes [44][45][46][47][48][49][50]. These characteristics make it suitable as a host material for lanthanide complex doping.…”

Photoluminescence of Alq3‐ and Tb‐activated aluminium–tris(8‐hydroxyquinoline) complex for blue chip‐excited OLEDs

“…In the blended thin film of Alq 3 :PMMA with different concentration ratios, neither annealing nor sublimation at high temperature was carried out, hence the structure of the Alq3 molecule remains the same in the blended thin film as it was in Alq 3 powder, and still we observed a slight blue shift of 4 nm in a blended thin film of 1 wt% concentration and a red shift of 12 nm in a blended thin film of 10 wt% concentration. The observed blue shift of emission may be attributed to cross‐relaxation , whereas the red shift of emission may be attributed to the change from a two‐dimensional (2D) excitation state (surface component) to a three‐dimensional (3D) excitation state (bulk component) .…”

Sensitization and intra-molecular energy transfer of Eu3+ by Tb3+ in Eu-Tb binuclear complexes/PMMA

“…The positive P value in Table 3 demonstrates that the fluorescence emission of europium ions was greatly sensitized by terbium ions. PMMA, as a matrix to the luminescence complexes, had great effects on the PL properties of Eu 3+ because of the strong coordination interaction between Eu 3+ and C=O group [11] . The interaction between the ligands and PMMA resulted in the formation of different microenvironments around Eu 3+ , which changes with the composition of the composite, as can be seen in Fig.3.…”

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

“…Poly methyl methacrylate (PMMA) exhibits high transparency in the visible spectral region, excellent weather resistance, and high mechanical strength. Moreover, PMMA contains carbonyl groups along with its carbon chain that can be interacted with Ln complexes [44][45][46][47][48][49][50]. These characteristics make it suitable as a host material for lanthanide complex doping.…”

Photoluminescence of Alq3‐ and Tb‐activated aluminium–tris(8‐hydroxyquinoline) complex for blue chip‐excited OLEDs

“…In the blended thin film of Alq 3 :PMMA with different concentration ratios, neither annealing nor sublimation at high temperature was carried out, hence the structure of the Alq3 molecule remains the same in the blended thin film as it was in Alq 3 powder, and still we observed a slight blue shift of 4 nm in a blended thin film of 1 wt% concentration and a red shift of 12 nm in a blended thin film of 10 wt% concentration. The observed blue shift of emission may be attributed to cross‐relaxation , whereas the red shift of emission may be attributed to the change from a two‐dimensional (2D) excitation state (surface component) to a three‐dimensional (3D) excitation state (bulk component) .…”

Sensitization and intra-molecular energy transfer of Eu3+ by Tb3+ in Eu-Tb binuclear complexes/PMMA

“…The positive P value in Table 3 demonstrates that the fluorescence emission of europium ions was greatly sensitized by terbium ions. PMMA, as a matrix to the luminescence complexes, had great effects on the PL properties of Eu 3+ because of the strong coordination interaction between Eu 3+ and C=O group [11] . The interaction between the ligands and PMMA resulted in the formation of different microenvironments around Eu 3+ , which changes with the composition of the composite, as can be seen in Fig.3.…”

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

“…Poly methyl methacrylate (PMMA) exhibits high transparency in the visible spectral region, excellent weather resistance, and high mechanical strength. Moreover, PMMA contains carbonyl groups along with its carbon chain that can be interacted with Ln complexes [44][45][46][47][48][49][50]. These characteristics make it suitable as a host material for lanthanide complex doping.…”