Phosphors with long-persistent green phosphorescence

Yen, William M.; Jia, Weiyi; Lu, Lizhu; Yuan, Huabiao

Title: Phosphors with long-persistent green phosphorescence

Patent · Mon Jan 01 00:00:00 EST 2001

OSTI ID:873893

Yen, William M.; Jia, Weiyi; Lu, Lizhu; Yuan, Huabiao

This invention relates to phosphors including long-persistence green phosphors. Phosphors of the invention are represented by the general formula: wherein k-1-2x-2y, x is a number ranging from about 0.0001 to about 0.05, y is a number ranging from about x to about 3x, M is an alkaline earth metal, and R.sup.3+ is one or more trivalent metal ions. Phosphors of this invention include powders, ceramics, single crystals and single crystal fibers. A method of manufacturing improved phosphors and a method of manufacturing single crystal phosphors are also provided.

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Research Organization:: University of Georgia, Atlanta, GA (United States); University of Puerto Rico, San Juan (Puerto Rico)

Sponsoring Organization:: USDOE

DOE Contract Number:: FG02-94ER75764

Assignee:: University of Georgia Research Foundation, Inc. (Atlanta, GA); University of Puerto Rico (San Juan, PR)

Patent Number(s):: 6,267,911

Application Number:: 09/187,943

OSTI ID:: 873893

Resource Relation:: Patent File Date: 1998 Nov 06

Country of Publication:: United States

Language:: English

References (12)

Growth and characteristics of long persistent SrAl2O4- and CaAl2O4-based phosphor crystals by a floating zone technique Katsumata, T.; Nabae, T.; Sasajima, K. Journal of Crystal Growth, Vol. 183, Issue 3 https://doi.org/10.1016/S0022-0248(97)00308-4	journal	January 1998
Characteristics of Strontium Aluminate Crystals Used for Long-Duration Phosphors Katsumata, Tooru; Sasajima, Kazuhito; Nabae, Takehiko Journal of the American Ceramic Society, Vol. 81, Issue 2 https://doi.org/10.1111/j.1151-2916.1998.tb02349.x	journal	February 1998
Effects of Composition on the Long Phosphorescent SrAl[sub 2]O[sub 4]:Eu[sup 2+], Dy[sup 3+] Phosphor Crystals Katsumata, T. Journal of The Electrochemical Society, Vol. 144, Issue 9 https://doi.org/10.1149/1.1837931	journal	January 1997
Luminescence of Eu2+ in strontium aluminates prepared by the hydrothermal method Kutty, T. R. N.; Jagannathan, R.; Rao, R. P. Materials Research Bulletin, Vol. 25, Issue 11 https://doi.org/10.1016/0025-5408(90)90217-P	journal	November 1990
A New Long Phosphorescent Phosphor with High Brightness, SrAl[sub 2]O[sub 4]:Eu[sup 2+],Dy[sup 3+] Matsuzawa, T. Journal of The Electrochemical Society, Vol. 143, Issue 8 https://doi.org/10.1149/1.1837067	journal	January 1996
Fluorescent Properties of Alkaline Earth Aluminates of the Type MAl[sub 2]O[sub 4] Activated by Divalent Europium Palilla, Frank C.; Levine, Albert K.; Tomkus, Maija R. Journal of The Electrochemical Society, Vol. 115, Issue 6 https://doi.org/10.1149/1.2411379	journal	January 1968
Preparation of Single Crystal Fibers Yen, W. M. Insulating Materials for Optoelectronics: New Developments https://doi.org/10.1142/9789812813015_0002	book	November 1995
Principles of Zone-Melting Pfann, W. G. JOM, Vol. 4, Issue 7 https://doi.org/10.1007/BF03398137	journal	July 1952
Laser-heated pedestal growth of laser and IR-upconverting materials Tissue, B. M.; Lu, Lizhu; Ma, Li Journal of Crystal Growth, Vol. 109, Issue 1-4 https://doi.org/10.1016/0022-0248(91)90198-E	journal	February 1991
Phosphorescent dynamics in SrAl2O4: Eu2 +, Dy3 + single crystal fibers Jia, Weiyi; Yuan, Huabiao; Lu, Lizhu Journal of Luminescence, Vol. 76-77 https://doi.org/10.1016/S0022-2313(97)00230-5	journal	February 1998
Optical and Electrical Properties of SrAl[sub 2]O[sub 4]:Eu[sup 2+] Abbruscato, Victor Journal of The Electrochemical Society, Vol. 118, Issue 6 https://doi.org/10.1149/1.2408226	journal	January 1971
Ein neues Verfahren zur Messung der Kristallisationsgeschwindigkeit der Metalle Czochralski, J. Zeitschrift für Physikalische Chemie, Vol. 92U, Issue 1 https://doi.org/10.1515/zpch-1918-9212	journal	January 1918

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Related Subjects

phosphors
long-persistent
green
phosphorescence
relates
including
long-persistence
represented
formula
msubk
alsub2
osub4
2xeusup22yrsup3
k-1-2x-2y
ranging
00001
005
3x
alkaline
earth
metal
rsup3
trivalent
powders
ceramics
single
crystals
crystal
fibers
method
manufacturing
improved
provided
alkaline earth
single crystal
earth metal
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Title: Phosphors with long-persistent green phosphorescence

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