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

研究成果: 雜誌貢獻文章同行評審

1030 引文 斯高帕斯(Scopus)


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.
期刊Nature Communications
出版狀態已發佈 - 7月 8 2014

ASJC Scopus subject areas

  • 化學 (全部)
  • 生物化學、遺傳與分子生物學 (全部)
  • 物理與天文學 (全部)


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