Quantum efficiency of yttrium and terbium garnets
A measurement system and mathematical procedure are developed for determining the quantum efficiency of luminescent materials. This technique based on standard photoluminescence DARSA PSI 5100 system (Diode Array Rapid Scan Analysis, Professional Scientific Instrument Co, Korea) or any other t...
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
D.Ghitu Institute of Electronic Engineering and Nanotechnologies
2006
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/97aa95ce51ce44988dd7d6e9f3cedf58 |
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| Sumario: | A measurement system and mathematical procedure are developed for determining the
quantum efficiency of luminescent materials. This technique based on standard
photoluminescence DARSA PSI 5100 system (Diode Array Rapid Scan Analysis,
Professional Scientific Instrument Co, Korea) or any other that allows measure the emission
and excitation spectra, is applied to conventional phosphor powders. The system described is
tested for excitation in the near-UV and visible regions, but can be applied to higher energy
excitation (UV), as well as lower energy excitation to near-IR, with the appropriate
photodetectors and optical filters. The system was tested on standard phosphors and on the
new compositions. The accuracy of this measurement technique is acceptable for express
analysis of quantum efficiency of luminescent materials.
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