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Carbidonitridosilicate luminescent substances

A carbon nitride silicate, luminescent material technology, applied in the field of inorganic luminescent materials, can solve problems such as lack of information on compound luminescence

Inactive Publication Date: 2008-08-27
LEUCHTSTOFFWERK BREITUNGEN GMBH (DE) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Information about the luminescence of such compounds is currently completely lacking in the specialized literature

Method used

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  • Carbidonitridosilicate luminescent substances

Examples

Experimental program
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Effect test

Embodiment 1

[0040] For the preparation of terbium and cerium activated carbonitride silicate Y 1.00 Si 4 N 6 C:Tb 0.99 Ce 0.01 , the metal terbium was first nitrided in a horizontal tube furnace at 1200 °C in a pure nitrogen atmosphere for 12 hours to become TbN x (x≈0.99).

[0041] Then, 34.24 g of TbN x , 17.78g metal yttrium, 0.28g metal cerium, 28.06g α-Si 3 N 4 and 8.02 g of the original material of SiC were thoroughly mixed in an agate mortar in a dry nitrogen atmosphere and put into a molybdenum crucible. This powder mixture was fired at 1600° C. in pure nitrogen for 10 hours, and then cooled to room temperature in a furnace. A green-emitting luminescent substance is obtained after removal of unreacted and loose components: Composition Y 1.00 Si 4 N 6 C:Tb 0.99 Ce 0.01 .

Embodiment 2

[0043] For the production of synthetic Gd with 5% europium activated carbonitride silicate 18 Sr 0.2 Si4N 6.2 C 0.8 , the pure metal strontium and metal europium were nitridated in a horizontal tube furnace at 850 °C in a pure nitrogen atmosphere for 2 hours to become the precursor Sr 3 N 2 and EuN. Then, 56.61g of metal gadolinium, 2.91g of Sr 3 N 2 , 1.66g of EuN, 29.93g of α-Si 3 N 4 and 6.42g of SiC were thoroughly mixed in a dry nitrogen atmosphere, and placed in a heat-resistant crucible. The ignition of the mixture was carried out at 1750° C. for 24 hours in a nitrogen-hydrogen atmosphere (90:10). Efficient red-emitting luminescent substances were obtained after appropriate sample reprocessing.

[0044] The figures are generally self-evident to those skilled in the art of luminescent substances. A rationale for the illustrated factual situation is given above. In the following, only some special points will be supplemented.

[0045] It can be seen from Figu...

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Abstract

The invention relates to a luminescent substance consisting of a doped host lattice which absorbs at least one part of exciting radiation whet it is excited by a high-energy exciting radiation, thereby releasing an energy-poor emission radiation. According to said invention the host lattice is embodied in the form of a carbidonitridosilicate-based compound. An illuminant which is used for producing white light and comprises a light emitting element and said luminescent substance are also disclosed.

Description

technical field [0001] The invention relates to phosphors which efficiently absorb high-energy excitation radiation and efficiently convert it into low-energy emission radiation. In this case, ultraviolet (UV) radiation or blue light is particularly suitable as excitation radiation, resulting in radiation conversion in the green, yellow, orange and / or red range of the visible spectrum. Background technique [0002] It has long been known that phosphors can advantageously be used not only for the visualization of invisible radiation images (for example in X-ray diagnostics or display technology), but also for general lighting purposes (for example in fluorescent lamps or with for the production of white light-emitting diodes (LEDs). Such luminescent substances generally have a host lattice which is doped with specific elements. For this reason, sulfides, halides and oxides are currently mainly used in technical applications as host lattices of such emitters, or to a particu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/14H01L33/48
CPCC04B35/584C04B35/597C04B2235/3224C04B2235/3225C04B2235/3229C04B2235/3856C04B2235/40C09K11/0883C09K11/7721C09K11/7749C09K11/7774C09K11/7792H05B33/14Y02B20/181Y02B20/00C09K11/77747C09K11/77927C09K11/62C09K11/77
Inventor 德特勒夫·斯塔里克斯文·罗斯勒西尔科·罗斯勒胡贝图斯·特蕾西娅·欣岑李远强
Owner LEUCHTSTOFFWERK BREITUNGEN GMBH (DE)
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