Synthesis and Luminescence Properties of Novel Ce 3+ - and Eu 2+ -Doped Lanthanum Bromothiosilicate La 3 Br(SiS 4 ) 2 Phosphors for White LEDs

Szu Ping Lee, Shuang De Liu, Ting Shan Chan, Teng-Ming Chen*

*此作品的通信作者

研究成果: Article同行評審

36 引文 斯高帕斯(Scopus)

摘要

Novel Ce 3+ - and Eu 2+ -doped lanthanum bromothiosilicate La 3 Br(SiS 4 ) 2 :Ce 3+ and La 3 Br(SiS 4 ) 2 :Eu 2+ phosphors were prepared by solid-state reaction in an evacuated and sealed quartz glass ampule. The La 3 Br(SiS 4 ) 2 :Ce 3+ phosphor generates a cyan emission upon excitation at 375 nm, whereas the La 3 Br(SiS 4 ) 2 :Eu 2+ phosphor could be excited with extremely broad range from UV to blue region (300 to 600 nm) and generates a reddish-orange broadband emission centered at 640 nm. In addition, thermal luminescence properties of La 3 Br(SiS 4 ) 2 :Ce 3+ and La 3 Br(SiS 4 ) 2 :Eu 2+ phosphors from 20 to 200°C were investigated. The combination of a 450 nm blue InGaN-based LED chip with the red-emitting La 3 Br(SiS 4 ) 2 :Eu 2+ phosphor, and green-emitting BOSE:Eu 2+ commercial phosphor produced a warm-white light with the CRI value of ∼95 and the CCT of 5,120 K. Overall, these results show that the prepared phosphors may have potential applications in pc-WLED.

原文English
頁(從 - 到)9218-9223
頁數6
期刊ACS Applied Materials and Interfaces
8
發行號14
DOIs
出版狀態Published - 27 四月 2016

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