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

Ming Zhao; Hongxu Liao; Maxim S. Molokeev; Yayun Zhou; Qinyuan Zhang; Quanlin Liu; Zhiguo Xia

doi:10.1038/s41377-019-0148-8

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

Article

- Emerging ultra-narrow-band cyan-emitting phosphor for white LEDs with enhanced color rendition
- Light: Science & Applications Vol. 8, Issue 3, Pages: 341-349(2019)
- Affiliations：
  
  1.The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, 100083, Beijing, China
  2.Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
  3.Siberian Federal University, Krasnoyarsk, 660041, Russia
  4.Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russia
  5.State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, 510641, Guangzhou, China
- Author bio：
  
  Zhiguo Xia (xiazg@ustb.edu.cn)
- Funds：
- DOI：10.1038/s41377-019-0148-8
  CLC：
- Published：2019，
  
  Published Online：10 April 2019，
  
  Received：07 August 2018，
  
  Revised：25 March 2019，
  
  Accepted：26 March 2019
- Accepted：
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Zhao, M. et al. Emerging ultra-narrow-band cyan-emitting phosphor for white LEDs with enhanced color rendition. Light: Science & Applications, 8, 341-349 (2019).
DOI：

Zhao, M. et al. Emerging ultra-narrow-band cyan-emitting phosphor for white LEDs with enhanced color rendition. Light: Science & Applications, 8, 341-349 (2019). DOI： 10.1038/s41377-019-0148-8.

摘要

Abstract

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. Na

0.5

SiO

:Eu

(NKLSO:Eu

) 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 ℃. The ultra-narrow-band cyan emission results from the high-symmetry cation sites

leading to almost ideal cubic coordination for UCr

-type compounds. NKLSO:Eu

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.

关键词

Keywords

references

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