2001•Journal of Vacuum Science & Technology B Microelectronics and Nanometer Structures Processing Measurement and PhenomenaRequires access
Low voltage, blue phosphor for highly efficient field emission display screens
V. A. Bolchouchine, E. T. Goldburt, B. N. Levonovitch, V. N. Litchmanova, N. P. Sochtine
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Abstract
Ce-doped yttrium orthosilicate, P47, is a blue phosphor used in a nonsulfur containing phosphor triad for field emission display (FED) displays. Its low luminous efficiency does not allow one to achieve the necessary light output. For the first time, a modified yttrium orthosilicate, nonsulfur containing blue phosphor has been synthesized and 4 in. phosphor screens with superior performance have been fabricated. This performance, 1.4 lm/W intrinsic luminous efficiency at 400 V and 5 μA/cm2, is significantly better than that of Nichia 1047 phosphor, which is 0.5 lm/W. Based on this blue phosphor and phosphor screen performance, a white light output of 4.5–5 lm/W is now possible in low-voltage FED displays. This performance is dramatically higher than that of compatible active matrix liquid crystal displays.