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Blue-green and green phosphors for lighting applications

一种磷光体、光源的技术，应用在蓝-绿色和绿色磷光体领域，能够解决改变、光变暗颜色等问题

Active Publication Date: 2010-06-09
GE LIGHTING SOLUTIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, since the quantum efficiency of different phosphors can change at different rates with increasing temperature, the light emitted by the device may dim or change color as the device enters steady-state operation

Method used

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  • Blue-green and green phosphors for lighting applications
  • Blue-green and green phosphors for lighting applications
  • Blue-green and green phosphors for lighting applications

Examples

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Embodiment Construction

[0027] Embodiments of the present invention provide phosphors that can be used in light emitting systems to generate blue or blue-green light. The phosphor comprises a general formula of ((Sr 1-z m z ) 1-(x+w) A w Ce x ) 3 (Al 1-y Si y )O 4+y+3(x-w) f 1-y-3(x-w) The system of (I), wherein 0<x≤0.10 and 0≤y≤0.5, 0≤z≤0.5, 0≤w≤x, A is Li, Na, K, Rb or any combination thereof, and M is Ca, Ba, Mg, Zn or any combination thereof. Advantageously, phosphors prepared according to these general formulas can maintain emission intensity (quantum efficiency) across a wide temperature range. The phosphor can be used in light emitting systems such as LEDs and fluorescent tubes, etc. to produce blue and blue / green light. Additionally, other embodiments provide phosphor blends that can be used to produce other colors, such as white light suitable for general lighting and other purposes.

[0028] In the general formula I shown above, Ce 3+ and Si 4+ The addition of ions is charge b...

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Abstract

Embodiments of the present techniques provide a related family of phosphors (22) that may be used in lighting systems to generate blue or blue-green light. The phosphors (22) include systems having a general formula of: ((Sr 1-z M z ) 1-(x+w) A w Ce x ) 3 (Al 1-y Si y )O 4+y+3(x-w) F 1-y-3(x-w) (I), wherein 0<x<=0.10, 0<=y<=0.5, 0<=z<=0.5, 0<=w<=x, A is Li, Na, K, Rb, or Ag or any combinations thereof, and M is Ca, Ba, Mg, Zn, or Sn or any combinations thereof. Advantageously, phosphors (22) made accordingly to these formulations maintain emission intensity across a wide range of temperatures. The phosphors may be used in lighting systems, such as LEDs (10) and fluorescent tubes, among others, to produce blue and blue / green light. Further, the phosphors may be used in blends with other phosphors, or in combined lighting systems, to produce white light suitable for illumination.

Description

[0001] Statement Regarding Federal Government Research & Development Sponsorship [0002] This invention was made with government support under Contract No. DE-FC26-06NT42934 awarded by the Department of Energy. The government has certain rights in this invention. technical field [0003] The present invention relates to blue-green and green phosphors for lighting applications. Background technique [0004] The present invention generally relates to novel phosphorescent compositions. More particularly, the present invention describes phosphors that retain most of their room temperature quantum efficiencies at elevated temperatures. The phosphors can be used in light emitting diodes, Hg-based fluorescent lamps, gas discharge lamps, for UV, violet and / or blue lasers, and other white or colored light sources for different purposes. [0005] Phosphors are luminescent materials that absorb radiant energy in one region of the electromagnetic spectrum and emit energy in another ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V9/10C09K11/86H01L33/00F21Y101/02F21V9/40
CPCH01L2224/49107H01L2224/48257C09K11/7721H01L2224/48091H01L33/502Y02B20/181H01L2224/48247H01L2224/04042H01L2224/06102H01L2924/181H01L2224/8592H01L2224/73265Y02B20/00C09K11/77214H01L2924/00014H01L2924/00012C09K11/77F21K2/08H05B33/14
Inventor A·A·塞特卢尔R·G·钱德兰C·S·亨德森P·K·纳马尔瓦E·拉德科夫
Owner GE LIGHTING SOLUTIONS LLC
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