(Y,Gd)BO[sub 3]:Eu[sup 3+] and Y(V,P)O[sub 4]:Eu[sup 3+] Thin-Film Phosphors for Use in Transparent Plasma Display Panels

Abstract

(Y,Gd)BO3:Eu3+ and Y(V,P)normalO4:Eu3+ thin-film phosphors were deposited on conventional and corrugated substrates to test their applicability for use in transparent plasma display panels (PDPs). The exact target structure and stoichiometry of Y(V,P)normalO4:Eu3+ and (Y,Gd)BO3:Eu3+ transferred well to the single-phase film by optimizing the deposition conditions. The corrugated substrates consisting of nanorod-type two-dimensional photonic crystal layers enhanced the photoluminescence efficiency, albeit at the expense of transparency. We employed the fact that conventional PDPs would adopt a mixture powder of (Y,Gd)BO3:Eu3+ and Y(V,P)normalO4:Eu3+ as a compromise between luminance and color chromaticity. To achieve this compromise in a thin-film state, we prepared a sandwich-type thin film using (Y,Gd)BO3:Eu3+ and Y(V,P)normalO4:Eu3+ phosphors.

Recent progress in low-voltage cathodoluminescent materials: synthesis, improvement and emission properties

“…poor adherence to substrates, poor preparation of phosphor screens (thin films) from phosphor powders, and the color saturation and color index need be further improved to enhance display quality. 15,76,77 All of these considerations and the ever-growing demand for highly efficiently low voltage cathodoluminescent materials in FEDs have prompted researchers to reach an understanding that more attention should be paid to improve existing phosphors and develop newly efficient low voltage cathodoluminescent materials.…”

“…The resolution is a vital parameter for display devices, which is strongly related to color saturation, namely, the color gamut of the phosphor. 27,76 Generally, the wider the color gamut of the phosphor, the higher picture quality can be achieved. 76 The color gamut for phosphors is depicted by the location of their CIE chromaticity coordinates.…”

“…27,76 Generally, the wider the color gamut of the phosphor, the higher picture quality can be achieved. 76 The color gamut for phosphors is depicted by the location of their CIE chromaticity coordinates. The typical color gamut for FEDs is made up of a triangle region enclosed by three chromaticity coordinate points of trichromatic (Red, Green and Blue, RGB) FED phosphors, (0.647, 0.343) (Y 2 O 2 S:Eu 3+ ; red), (0.298, 0.619) (ZnS:Cu,Al; green) and (0.146, 0.056) (ZnS:Ag,Al; blue).…”

Fabrication of biomimetic patterns for high transmission and antifogging property

“…Therefore, achieving higher optical transmission in the visible and near-IR spectra by an effective antireection (AR) coating is a key issue for overcoming some important obstacles for optoelectronic devices, such as the losses due to the surface reection, the angular dependence of the reectivity for the standard multilayer coatings in PV panels and CPV systems, poor light extraction efficiency in light-emitting diodes, poor contrast and brightness in display devices. [4][5][6][7][8] Up to now, two main approaches have been applied to fabricate efficient AR coatings: thin lm coatings and graded index coatings. 9 The limitation of thin lm coatings is that high transmission can be achieved only in narrow ranges of wavelength and incidence angles.…”

Metal-ion doped luminescent thin films for optoelectronic applications

“…On the other hand, the research interest in luminescent thin lms has been reected by the rapid developments in a variety of thin-lm luminescent devices, including at-panel displays, light sources, solar cells and integrated optics systems. [9][10][11][12] Luminescent thin lms have several advantages over powders in these applications, such as higher lateral resolution from smaller grains, better thermal stability, reduced outgassing rate, and better adhesion to the solid surface. [13][14][15] Luminescent thin lms can be prepared by a variety of deposition techniques, such as pulsed laser deposition (PLD), [16][17][18] sputtering, 19,20 molecular beam epitaxy (MBE), 21 spray pyrolysis, [22][23][24] sol-gel method, [25][26][27] etc.…”