Effects of processing on the low-voltage performance of cathodoluminescent garnet phosphors

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Field emission flat panel displays place new demands on the performance of cathodoluminescent phosphors. In particular, such phosphors must be efficient at lower voltages (ca. 100-1000 V), and must withstand higher current densities than are present on cathode ray tube screens. ZnO:Zn has been studied extensively as a low-voltage phosphor, but problems such as poor chromatic saturation and temperature sensitivity of emission remain. In this work the use of terbium-doped garnet phases such as yttrium aluminum garnet (YAG) and gadolinium gallium garnet (GGG) as low voltage green-emitting phosphors is evaluated. Hydrothermal synthesis yields well-faceted YAG grains with particle diameters of ... continued below

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6 p.

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Phillips, M.L.F. & Shea, L.E. August 1, 1995.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Field emission flat panel displays place new demands on the performance of cathodoluminescent phosphors. In particular, such phosphors must be efficient at lower voltages (ca. 100-1000 V), and must withstand higher current densities than are present on cathode ray tube screens. ZnO:Zn has been studied extensively as a low-voltage phosphor, but problems such as poor chromatic saturation and temperature sensitivity of emission remain. In this work the use of terbium-doped garnet phases such as yttrium aluminum garnet (YAG) and gadolinium gallium garnet (GGG) as low voltage green-emitting phosphors is evaluated. Hydrothermal synthesis yields well-faceted YAG grains with particle diameters of less than 1 {mu}m. Cathodoluminescent efficiency at a particular voltage was not affected by synthetic route, though the hydrothermally synthesized material was less susceptible to damage at high power densities. An efficiency of 3.5 lm/W was observed for GGG:Tb at 800 V. Deposition of the phosphors onto conducting screens increased their efficiencies at very low voltages (< 200 V). These materials may be considered alternatives to reduced zinc oxide as green-emitting phosphors.

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6 p.

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OSTI as DE95015773

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  • 27. international technical conference of the Society for the Advancement of Material and Process Engineering (SAMPE): diversity into the next century, Albuquerque, NM (United States), 9-12 Oct 1995

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  • Other: DE95015773
  • Report No.: SAND--95-1640C
  • Report No.: CONF-951033--10
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 94652
  • Archival Resource Key: ark:/67531/metadc794884

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  • August 1, 1995

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  • Dec. 19, 2015, 7:14 p.m.

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  • June 23, 2016, 3:42 p.m.

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Phillips, M.L.F. & Shea, L.E. Effects of processing on the low-voltage performance of cathodoluminescent garnet phosphors, article, August 1, 1995; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc794884/: accessed November 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.