New strategy for designing orangish-red-emitting phosphor via oxygen-vacancy-induced electronic localization

Yi Wei; Gongcheng Xing; Kang Liu; Guogang Li; Peipei Dang; Sisi Liang; Min Liu; Ziyong Cheng; Dayong Jin; Jun Lin

doi:10.1038/s41377-019-0126-1

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New strategy for designing orangish-red-emitting phosphor via oxygen-vacancy-induced electronic localization

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- New strategy for designing orangish-red-emitting phosphor via oxygen-vacancy-induced electronic localization
- Light: Science & Applications Vol. 8, Issue 1, Pages: 136-144(2019)
- Affiliations：
  
  1.Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, 430074, Wuhan, People's Republic of China
  2.State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022, Changchun, People's Republic of China
  3.Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, 410083, Changsha, Hunan, People's Republic of China
  4.State Key Laboratory of Powder Metallurgy, Central South University, 932 South Lushan Road, 410083, Changsha, Hunan, People's Republic of China
  5.Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia
  6.School of Applied Physics and Materials, Wuyi University, 529020, Jiangmen, Guangdong, People's Republic of China
- Author bio：
  
  Jun Lin (1057965688@qq.com)
- Funds：
- DOI：10.1038/s41377-019-0126-1
  CLC：
- Published：2019，
  
  Published Online：30 January 2019，
  
  Received：13 October 2018，
  
  Revised：13 December 2018，
  
  Accepted：14 December 2018
- Accepted：
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Wei, Y. et al. New strategy for designing orangish-redemitting phosphor via oxygen-vacancyinduced electronic localization. Light: Science & Applications, 8, 136-144 (2019).
DOI：

Wei, Y. et al. New strategy for designing orangish-redemitting phosphor via oxygen-vacancyinduced electronic localization. Light: Science & Applications, 8, 136-144 (2019). DOI： 10.1038/s41377-019-0126-1.

摘要

Abstract

Phosphor-converted white-light-emitting diodes (pc-WLED) have been extensively employed as solid-state lighting sources

which have a very important role in people's daily lives. However

due to the scarcity of the red component

it is difficult to realize warm white light efficiently. Hence

red-emitting phosphors are urgently required for improving the illumination quality. In this work

we develop a novel orangish-red La

GeO

:Bi

phosphor

the emission peak of which is located at 600 nm under near-ultraviolet (n-UV) light excitation. The full width at half maximum (fwhm) is 103 nm

the internal quantum efficiency (IQE) exceeds 88%

and the external quantum efficiency (EQE) is 69%. According to Rietveld refinement analysis and density functional theory (DFT) calculations

ions randomly occupy all La sites in orthorhombic La

GeO

. Importantly

the

oxygen-vacancy-induced electronic localization around the Bi

ions is the main reason for the highly efficient orangish-red luminescence. These results provide a new perspective and insight from the local electron structure for designing inorganic phosphor materials that realize the unique luminescence performance of Bi

ions.

关键词

Keywords

references

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