Energy-Efficient, High-Color-Rendering LED Lamps Using Oxyfluoride and Fluoride Phosphors

被引：254

作者：

Setlur, Anant A. ^{[1
]}

Radkov, Emil V. ^{[1
,2
]}

Henderson, Claire S.

Her, Jae-Hyuk

Srivastava, Alok M.

Karkada, Nagaveni ^{[3
]}

Kishore, M. Satya ^{[3
]}

Kumar, N. Prasanth ^{[3
]}

Aesram, Danny ^{[2
]}

Deshpande, Anirudha ^{[2
]}

Kolodin, Boris ^{[2
]}

Grigorov, Ljudmil S. ^{[4
]}

Happek, Uwe ^{[5
]}

机构：

[1] GE Global Res, Niskayuna, NY 12309 USA

[2] GE Lighting Solut, E Cleveland, OH 44112 USA

[3] GE Global Res, Bangalore 560066, Karnataka, India

[4] Univ Sofia, Sci Res Dept, Sofia 1164, Bulgaria

[5] Univ Georgia, Dept Phys & Astron, Athens, GA 30602 USA

来源：

CHEMISTRY OF MATERIALS | 2010年 / 22卷 / 13期

关键词：

LUMINESCENCE PROPERTIES; CE3+ LUMINESCENCE; EMISSION; BA;

D O I：

10.1021/cm100960g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

LED lamps using phosphor downconversion can be designed to replace incandescent or halogen sources with a "warm-white" correlated color temperature (CCT) of 2700-3200 K and a color rendering index (CRI) greater than 90. However, these lamps have efficacies of similar to 70% of standard "cool-white" LED packages (CCT = 4500-6000 K; CRI = 75-80). In this report, we describe structural and luminescence properties of fluoride and oxyfluoride phosphors, specifically a (Sr,Ca)(3)(Al,Si)O-4(F,O):Ce3+ yellow-green phosphor and a K2TiF6:Mn4+ red phosphor, that can reduce this gap and therefore meet the spectral and efficiency requirements for high-efficacy LED lighting. LED lamps with a warm-white color temperature (3088 K), high CRI (90), and an efficacy of similar to 82 lm/W are demonstrated using these phosphors. This efficacy is similar to 85% of comparable cool-white lamps using typical Y3Al5O12:Ce3+-based phosphors, significantly reducing the efficacy gap between warm-white and cool-white LED lamps that use phosphor downconversion.

引用

页码：4076 / 4082

页数：7

共 38 条

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