TITLE

The study of phosphor efficiency and homogeneity using a nuclear microprobe

AUTHOR(S)
Yang, C.; Doyle, B. L.; Nigam, M.; El Bouanani, M.; Duggan, J. L.; McDaniel, F. D.
PUB. DATE
July 2001
SOURCE
AIP Conference Proceedings;2001, Vol. 576 Issue 1, p535
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Ion Beam Induced Luminescence (IBIL) and Ion Beam Induced Charge Collection (IBICC) have been used to study the efficiency and the homogeneity of the luminescence emission in phosphors. The IBIL imaging was made by using sharply focused ion beams or broad/partially-focused ion beams. Samples were examined to reveal possible distributed crystal-defects that may lead to the inhomogeneity of the luminescence emission. The purpose of the study is to search for suitable thin films that have high homogeneity of luminescence emission and large IBIL efficiency under heavy ion excitation. These films may be placed as a thin layer on the top of microelectronic devices to be analyzed with Ion Photon Emission Microscopy (IPEM). The emission yields were found to be low for organic materials, due to saturation of the light output dependence on the energy deposition of heavy ions. The emission yield of a typical Bicron plastic scintillator is about 70 photons/ion/micron. Inorganic materials may have higher IBIL yields under high-energy and heavy-ion excitation, but the challenging problem is the inhomogeneity of the IBIL emissions. The IBIL image techniques are applied in the investigation of the homogeneity of a GaN epitaxial thin film, a zircon single crystal and a thin layer coated by Thiogallate (EuII) ceramic.
ACCESSION #
5663991

 

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