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Spectral decomposition of phosphorescence decays
N Fuhrmann1, J Brübach, A Dreizler
1Fachgebiet Reaktive Strömungen und Messtechnik (RSM), Center of Smart Interfaces (CSI), Technische Universität Darmstadt, Petersenstraße 32, 64287 Darmstadt, Germany.
The Review of Scientific Instruments
|December 3, 2013
Summary
This study introduces a multi-exponential method to analyze phosphorescence decay curves, enhancing temperature measurements in phosphor thermometry. The new approach complements traditional mono-exponential fitting, offering more detailed spectral distribution insights.
Area of Science:
- Materials Science
- Spectroscopy
- Physical Chemistry
Background:
- Phosphor thermometry relies on accurately fitting phosphorescence decay curves for temperature determination.
- Current methods often assume mono-exponential decay within specific temporal ranges, potentially limiting precision.
Purpose of the Study:
- To introduce and validate a multi-exponential method for analyzing phosphorescence decay times.
- To compare the multi-exponential approach with traditional mono-exponential fitting using simulated and real data.
- To investigate the impact of excitation laser energy on decay time distributions in thermographic phosphors.
Main Methods:
- Development of a multi-exponential fitting algorithm for phosphorescence decay analysis.
- Verification of the multi-exponential method using simulated noisy data.
- Application of spectral decomposition to the thermographic phosphor Mg4FGeO6 : Mn.
Main Results:
- The multi-exponential method provides a more comprehensive analysis of spectral distributions compared to mono-exponential fitting.
- Simulated data analysis confirmed the robustness of the multi-exponential approach in the presence of noise.
- Experimental application revealed changes in decay time distributions with varying excitation laser energy in Mg4FGeO6 : Mn.
Conclusions:
- Multi-exponential analysis offers a valuable complement to mono-exponential fitting for detailed phosphorescence decay characterization.
- This advanced method can improve the accuracy and robustness of temperature measurements in phosphor thermometry.
- Excitation laser energy significantly influences the decay time characteristics of thermographic phosphors.
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