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Author Seager, C. H.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
File Format PDF
Language English
Subject Keyword PHYSICS ♦ Cathodoluminescence ♦ Electric Fields ♦ Phosphors
Abstract When external electric fields are applied to phosphors the cathodoluminescence (CL) at low beam energies is strongly affected. This experiment has been carried out on a variety of common phosphors used in cathode ray tube applications, and the electron beam energy, beam current, and electric field dependence of the CL are thoroughly characterized. It is found that the general features of these effects, particular y the strong polarity and beam energy dependence, are consistent with a model which assumes that the main effect of the electric fields is to alter the populations of electrons `and holes at the phosphor surface. This in turn, modulates the non-radiative energy losses that strongly affect the low-beam-energy CL efficiency. Because the external fields are applied without any direct contact to the phosphor material, the large changes seen in the CL decay rapidly as the beam-created electrons and holes polarize, shielding the externally applied bias. These results have important implications for designing phosphors which might be efficient at low electron energies.
Educational Use Research
Learning Resource Type Article
Publisher Date 1999-01-14
Publisher Department Sandia National Laboratories, Albuquerque, NM, and Livermore, CA
Publisher Place United States
Journal Journal of Applied Physics
Technical Publication No. SAND99-0097J
Organization Sandia National Laboratories, Albuquerque, NM, and Livermore, CA


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