Emerging ultra-narrow-band cyan-emitting phosphor for white LEDs with enhanced color rendition

被引：460

作者：

Zhao, Ming ^{[1
]}

Liao, Hongxu ^{[1
]}

Molokeev, Maxim S. ^{[2
,3
,4
]}

Zhou, Yayun ^{[5
,6
]}

Zhang, Qinyuan ^{[5
,6
]}

Liu, Quanlin ^{[1
]}

Xia, Zhiguo ^{[1
,5
,6
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Municipal Key Lab New Energy Mat & Techno, Beijing 100083, Peoples R China

[2] Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia

[3] Siberian Fed Univ, Krasnoyarsk 660041, Russia

[4] Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia

[5] South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510641, Guangdong, Peoples R China

[6] South China Univ Technol, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, Guangzhou 510641, Guangdong, Peoples R China

来源：

LIGHT-SCIENCE & APPLICATIONS | 2019年 / 8卷 / 1期

基金：

俄罗斯基础研究基金会;

关键词：

LUMINESCENCE PROPERTIES; TEMPERATURE; ROUTE;

D O I：

10.1038/s41377-019-0148-8

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Phosphor-converted white LEDs rely on combining a blue-emitting InGaN chip with yellow and red-emitting luminescent materials. The discovery of cyan-emitting (470-500 nm) phosphors is a challenge to compensate for the spectral gap and produce full-spectrum white light. Na0.5K0.5Li3SiO4: Eu2+ (NKLSO: Eu2+) phosphor was developed with impressive properties, providing cyan emission at 486 nm with a narrow full width at half maximum (FWHM) of only 20.7 nm, and good thermal stability with an integrated emission loss of only 7% at 150 degrees C. The ultra-narrow-band cyan emission results from the high-symmetry cation sites, leading to almost ideal cubic coordination for UCr4C4-type compounds. NKLSO: Eu2+ phosphor allows the valley between the blue and yellow emission peaks in the white LED device to be filled, and the color-rendering index can be enhanced from 86 to 95.2, suggesting great applications in full-spectrum white LEDs.

引用

页数：9

共 31 条

[1] THERMAL QUENCHING OF CHARACTERISTIC FLUORESCENCE [J].