Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes

Haomiao Zhu, Chun Che Lin, Wenqin Luo, Situan Shu, Zhuguang Liu, Yongsheng Liu, Jintao Kong, En Ma, Yongge Cao, Ru Shi Liu, Xueyuan Chen

Research output: Contribution to journalArticle

586 Citations (Scopus)

Abstract

Mn4+-activated fluoride compounds, as an alternative to commercial (oxy)nitride phosphors, are emerging as a new class of non-rare-earth red phosphors for high-efficacy warm white LEDs. Currently, it remains a challenge to synthesize these phosphors with high photoluminescence quantum yields through a convenient chemical route. Herein we propose a general but convenient strategy based on efficient cation exchange reaction, which had been originally regarded only effective in synthesizing nano-sized materials before, for the synthesis of Mn4+-activated fluoride microcrystals such as K2 TiF6, K2 SiF6, NaGdF4 and NaYF4. Particularly we achieve a photoluminescence quantum yield as high as 98% for K2 TiF6:Mn4+. By employing it as red phosphor, we fabricate a high-performance white LED with low correlated colour temperature (3,556 K), high-colour-rendering index (R a=81) and luminous efficacy of 116 lm w-1. These findings show great promise of K2 TiF6:Mn4+ as a commercial red phosphor in warm white LEDs, and open up new avenues for the exploration of novel non-rare-earth red emitting phosphors.

Original languageEnglish
Article number4312
JournalNature Communications
Volume5
DOIs
Publication statusPublished - Jul 8 2014
Externally publishedYes

Fingerprint

Fluorides
Phosphors
phosphors
Light emitting diodes
light emitting diodes
Color
Earth (planet)
Light
Cations
Quantum yield
Temperature
fluorides
Photoluminescence
photoluminescence
color
Microcrystals
microcrystals
Nitrides
nitrides
emerging

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes. / Zhu, Haomiao; Lin, Chun Che; Luo, Wenqin; Shu, Situan; Liu, Zhuguang; Liu, Yongsheng; Kong, Jintao; Ma, En; Cao, Yongge; Liu, Ru Shi; Chen, Xueyuan.

In: Nature Communications, Vol. 5, 4312, 08.07.2014.

Research output: Contribution to journalArticle

Zhu, H, Lin, CC, Luo, W, Shu, S, Liu, Z, Liu, Y, Kong, J, Ma, E, Cao, Y, Liu, RS & Chen, X 2014, 'Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes', Nature Communications, vol. 5, 4312. https://doi.org/10.1038/ncomms5312
Zhu, Haomiao ; Lin, Chun Che ; Luo, Wenqin ; Shu, Situan ; Liu, Zhuguang ; Liu, Yongsheng ; Kong, Jintao ; Ma, En ; Cao, Yongge ; Liu, Ru Shi ; Chen, Xueyuan. / Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes. In: Nature Communications. 2014 ; Vol. 5.
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AU - Liu, Yongsheng

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