Photoluminescence
Last revised by Kanchanok Prasittimet
on 15 Mar 2025
Citation, DOI, disclosures and article data
Citation:
Vajuhudeen Z, Prasittimet K, Jones J, Photoluminescence. Reference article, Radiopaedia.org (Accessed on 27 Mar 2025) https://doi.org/10.53347/rID-79700
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rID:
79700
Article created:
2 Jul 2020,
Zemar Vajuhudeen
Disclosures:
At the time the article was created Zemar Vajuhudeen had no recorded disclosures.
View Zemar Vajuhudeen's current disclosures
Last revised:
15 Mar 2025,
Kanchanok Prasittimet
Disclosures:
At the time the article was last revised Kanchanok Prasittimet had no financial relationships to ineligible companies to disclose.
View Kanchanok Prasittimet's current disclosures
Revisions:
4 times, by
3 contributors -
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Synonyms:
- Phosphorescence
- Fluorescence
Photoluminescence is a type of luminescence in which energy source for material to absorb, store and convert to light are electromagnetic radiation. Photoluminescent materials have important applications in radiology.
Types
Fluorescence refers to the near instantaneous emission of light following photon absorption. It typically occurs over a timescale of 10-10-10-7 seconds.
Examples of fluorescence include intensifying screens in screen-film radiography.
Phosphorescence refers to the delayed emission of light following photon absorption, typically occurring over a timescale of 10⁻⁶ to 10 seconds. This phenomenon arises when an excited electron becomes temporarily trapped in an electron trap before eventually transitioning back to the valence band. These electron traps are created by incorporating impurities or additional elements into the material, altering its electronic structure to enable delayed luminescence.
Examples of phosphorescence include photostimulated luminescence (PSL) in computed radiography, and thermoluminescent dosimetry (TLD) in radiation dose monitoring.
References
- 1. Thomas S. Curry, James E. Dowdey, Robert C. Murry. Christensen's Physics of Diagnostic Radiology. (1990) ISBN: 9780812113105
- 2. Alim Yucel-Finn, Fergus Mckiddie, Sarah Prescott et al. Farr's Physics for Medical Imaging , E-Book. (2023) ISBN: 9780702083655 - Google Books
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