Coatings of MgO and Al2O3 were deposited on Y2O3:Eu and Y2SiO5:Tb field emission display phosphors by pulsed laser deposition. Steady-state and pulsed cathodoluminescence (CL) data were collected over a range of electron beam energies up to 4 keV. The reduced CL intensities from coated phosphors are consistent with a reduction in the energy of the incoming primary electrons. This energy loss can be attributed to inelastic collisions between the incident electron and the electrons of atoms in the coating layer. Monte Carlo simulations were used to verify the modeled results.
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Thomes et al. (2002) studied this question.
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