scholarly journals Energy transfer and unusual decay behaviour of BaCa2Si3O9:Eu2+,Mn2+ phosphor

2015 ◽  
Vol 44 (22) ◽  
pp. 10368-10376 ◽  
Author(s):  
Matthias Müller ◽  
Thomas Jüstel
Keyword(s):  
Energy Transfer ◽  
Luminescence Lifetime ◽  
Lifetime Measurements ◽  
Decay Behaviour

In this work the photoluminescence (PL) of BaCa2Si3O9:Eu2+, Mn2+ and the energy transfer between Eu2+ and Mn2+ were examined. Further, PL as well as luminescence lifetime measurements were performed at various temperatures.

scholarly journals Luminescence and energy transfer of co-doped Sr5MgLa2(BO3)6:Ce3+,Mn2+

RSC Advances ◽  
2015 ◽  
Vol 5 (83) ◽  
pp. 67979-67987 ◽  
Author(s):  
Matthias Müller ◽  
Stefan Fischer ◽  
Thomas Jüstel
Keyword(s):  
Energy Transfer ◽  
Fluorescence Lifetime ◽  
Lifetime Measurements ◽  
Chromaticity Coordinates ◽  
Co Doped

The photoluminescence (PL) of co-doped Sr5MgLa2(BO3)6:Ce3+,Mn2+ and energy transfer from Ce3+ to Mn2+ were studied. PL and fluorescence lifetime measurements were performed at various temperatures. External quantum efficiencies and chromaticity coordinates were obtained.

Overdriven Pulsed Light Emitting Diodes: An Inexpensive Excitation Source for Time-Resolved Luminescence Lifetime Measurements

2019 ◽  
Vol 96 (5) ◽  
pp. 1046-1050 ◽  
Author(s):  
Steven M. Drew ◽  
Deborah S. Gross ◽  
William E. Hollingsworth ◽  
Thomas Baraniak ◽  
Christopher M. Zall ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Excitation Source ◽  
Luminescence Lifetime ◽  
Pulsed Light ◽  
Lifetime Measurements ◽  
Time Resolved ◽  
Light Emitting

Excited State Dynamics of Novel Diporphyrins with Dissimilar Cores

1999 ◽  
Vol 03 (01) ◽  
pp. 70-77 ◽  
Author(s):  
M. RAVIKUMAR ◽  
R. P. PANDIAN ◽  
T. K. CHANDRASHEKAR
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Excitation Wavelength ◽  
Triplet Excited State ◽  
Lifetime Measurements ◽  
Time Resolved ◽  
Fluorescence Studies ◽  
Axial Ligation ◽  
Excitation Time ◽  
The Individual

The singlet and triplet excited state properties of two diporphyrins, H 2- H and Zn - H , are described. Steady state fluorescence studies indicate that the emission of the H 2- H diporphyrin is dependent on the excitation wavelength and is dominated by the emission of the individual constituent monomers at their respective excitation. Time-resolved studies show two lifetimes ascribable to the normal and thiaporphyrin subunits. However, the emission of the Zn - H diporphyrin is dominated by the thiaporphyrin subunit irrespective of the wavelength of excitation, suggesting an energy transfer from the Zn porphyrin subunit to the thiaporphyrin subunit. Lifetime measurements in toluene show two lifetimes due to open and folded conformations, while in DMF an additional component due to axial ligation is observed. The efficiency of energy transfer is moderately higher in DMF (72%) than in toluene (68%). Triplet ESR studies on the H 2- H dimer reveal a localized triplet with ZFS parameters and ESP pattern the same as for the individual monomers. On the other hand, triplet ESR of the Zn - H diporphyrin reveals triplet characteristics of the thiaporphyrin subunit, indicating an energy transfer in the triplet state.

Luminescence lifetime measurements. Elimination of phototube time shifts with the phase plane method

1985 ◽  
Vol 57 (12) ◽  
pp. 2304-2308 ◽  
Author(s):  
E. R. Carraway ◽  
B. L. Hauenstein ◽  
J. N. Demas ◽  
B. A. DeGraff
Keyword(s):  
Phase Plane ◽  
Luminescence Lifetime ◽  
Lifetime Measurements ◽  
Plane Method ◽  
Phase Plane Method

Portable Equipment for Luminescence Lifetime Measurements on Surfaces

2008 ◽  
Vol 62 (12) ◽  
pp. 1395-1399 ◽  
Author(s):  
A. Romani ◽  
C. Clementi ◽  
C. Miliani ◽  
B. G. Brunetti ◽  
A. Sgamellotti ◽  
...  
Keyword(s):  
Luminescence Lifetime ◽  
Portable Equipment ◽  
Lifetime Measurements
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