X-ray excited optical luminescence of CaF2: A candidate for UV water treatment

W. Chen, L. Ma, R. Schaeffer, R. Hoffmeyer, T. Sham, G. Belev, S. Kasap, R. Sammynaiken*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


Secondary optical processes are becoming more and more important in health and environmental applications. Ultraviolet produced from secondary emission or scintillation can damage DNA by direct photoexcitation or by the creation of reactive oxygen species. X-ray Excited Optical Luminescence (XEOL) and Time Resolved XEOL (TRXEOL) results for the fast emitter, CaF2:ZnO, that have been treated by heating in air and in vacuum, show that the scintillation from the Self Trapped Exciton (STE) emission of CaF2 at 282 nm is dominated by a slow process (>100 ns). A faster but weaker 10 ns component is also present. The ZnO and CaF2 show independent emission. The ZnO bandgap emission at 390 nm has dominant lifetimes of less than 1 ns.

Original languageEnglish
Article number012047
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 17 Jun 2015
Externally publishedYes
Event6th International Conference on Optical, Optoelectronic and Photonic Materials and Applications, ICOOPMA 2014 - Leeds, United Kingdom
Duration: 27 Jul 20141 Aug 2014


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