Comparison of low voltage phosphers

Cambridge University Press
Publication Type:
Conference Proceeding
Proceedings of Microscopy & Microanalysis 12, Suppl. 2, 2006, 2006, pp. 1526 - 1527
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Progress in field emission display (FED) technology requires the parallel development of phosphors that exhibit high cathodoluminescence (CL) efficiency at low voltage (< 1 kV) excitation and long term CL stability when subjected to high current densities. Five commercial phosphors, ZnO:Zn, YSiO5:Ce, Y2O3:Eu, SrGa2S4:Ce and SrGa2S4:Eu have been studied using low voltage scanning cathodoluminescence microscopy and spectroscopy at 300 K. All samples were powders with a 0.5 10 ìm particle size (Figure 1). ZnO:Zn was the only specimen that did not display any charging effects at 1 kV when using the in-lens secondary electron image mode, reflecting its good electrical conductivity compared with the other phosphors.
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