Review—Temperature Dependence of Luminescence Intensity and Decay Time in Mn4+-Activated Fluoride and Oxyfluoride Phosphors

The fluorescence decay time of naphthalene crystals has been measured as a function of sample thickness (1 μ-1 cm) and temperature (4.2°K-300°K) when excited in the first electronic state with UV pulses of short duration. A simple model is proposed to explain the decay mechanism, assuming constant quantum yield and oscillator strength and taking into account both Davydov-levels A and B. The reabsorption is found to be directly proportional to the temperature. The decay time of the lower Davydov-component can be measured directly as τA = (115 ± 5) nsec. The decay time of the higher level B is calculated from the dependence on the thickness as τB = (20 ± 10) nsec, and from the temperature dependence as TB= (30 ± 10) nsec.

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The temperature dependence of luminescence intensity on GaAs1-xPx:N

phys stat sol (a) ◽

10.1002/pssa.2210700209 ◽

1982 ◽

Vol 70 (2) ◽

pp. 423-431 ◽

Cited By ~ 7

Author(s):

R. Stegmann ◽

B. Kloth ◽

G. Oelgart

Keyword(s):

Temperature Dependence ◽

Luminescence Intensity

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Temperature dependence of luminescence decay time of InP quantum disks

Conference Proceedings. 1998 International Conference on Indium Phosphide and Related Materials (Cat. No.98CH36129) ◽

10.1109/iciprm.1998.712423 ◽

2002 ◽

Author(s):

T. Okuno ◽

Hong-Wen Ren ◽

M. Sugisaki ◽

K. Nishi ◽

S. Sugou ◽

...

Keyword(s):

Temperature Dependence ◽

Decay Time ◽

Luminescence Decay ◽

Luminescence Decay Time ◽

Quantum Disks

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Effect of Annealing Treatments on Optical and Luminescence Properties of Lu1.8Y0.2SiO5:Ce Single Crystal

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.655.198 ◽

2015 ◽

Vol 655 ◽

pp. 198-202

Author(s):

Ling Cong Fan ◽

Yuan Zhang ◽

Xiao Xiao Ji ◽

Ying Shi ◽

Jian Jun Xie ◽

...

Keyword(s):

Decay Time ◽

Luminescence Intensity ◽

Light Output ◽

Emission Spectra ◽

Annealing Treatment ◽

Czochralski Method ◽

Optical Transmittance ◽

Luminescence Properties ◽

Luminescence Efficiency ◽

Uv Excitation

LYSO:Ce crystal is one of efficient scintillation materials with high light output and short decay time. LYSO:Ce crystal grown by Czochralski method can be affected by annealing treatments. In present work, annealing treatments in different atmosphere (air, N2 and H2) were carried out on the LYSO:Ce crystals to investigate the effect on the optical and luminescence properties after annealing. The optical transmittance, excitation and emission spectrum, and the decay time have been attained at room temperature. Luminescence efficiency has been presented by the integrated area of emission spectra under ultraviolet (UV) excitation. It is found that annealing treatments almost do not affect the optical transmittance. Annealing in N2 atmosphere has no noteworthy effect on the luminescence intensity of LYSO:Ce crystals, but increases much annealing in H2 atmosphere, dramatically decreases the luminescence intensity after annealing in air. In addition, the decay time of LYSO:Ce crystals are affected by annealing treatment either in air or in H2 atmosphere.

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