Title:
ORANGE LIGHT LED FLUORESCENT POWDER, PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2017/035954
Kind Code:
A1
Abstract:
Provided are an orange light LED fluorescent powder, a preparation method therefor and a use thereof, wherein the LED fluorescent powder has a general formula represented by formula I: Sr9-a-b-xMaMg1.5+b(PO4)7 : xEu2+; and in formula I, M is one or two of Ca and Ba, and 0.001 ≤ x ≤ 0.9, 0 ≤ a ≤ 1.0, 0 ≤ b ≤ 2.3. The LED fluorescent powder with a phosphate as a matrix and Eu2+ ions as activation ions has stable chemical properties; the excitation band thereof is broader, the emission spectrum contains abundant red light components, and after the fluorescent powder is encapsulated with a blue light gallium nitride chip to form an LED, the LED can emit warm white light; and the fluorescent powder is non-radioactive, and does not harm the environment. The experimental results show that the fluorescent powder can be effectively excited by light in a wave band of 250-500 nm to emit broad peaks at 470-850 nm, wherein the main emission peak is located near 523 nm and 620 nm. The preparation method is simple, has lower production cost, and is easy for industrial production.
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Inventors:
LI CHENGYU (CN)
SUN WENZHI (CN)
PANG RAN (CN)
JIANG LIHONG (CN)
ZHANG SU (CN)
SUN WENZHI (CN)
PANG RAN (CN)
JIANG LIHONG (CN)
ZHANG SU (CN)
Application Number:
PCT/CN2015/094654
Publication Date:
March 09, 2017
Filing Date:
November 16, 2015
Export Citation:
Assignee:
CHANGCHUN INST APPLIED CHEMISTRY CAS (CN)
International Classes:
H01L33/50; C09K11/71
Foreign References:
| CN101818065A | 2010-09-01 | |||
| CN102051176A | 2011-05-11 | |||
| CN1775902A | 2006-05-24 |
Attorney, Agent or Firm:
CHINA SCIENCE PATENT & TRADEMARK AGENT LTD. (CN)
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