荧光粉
发光
涂层
材料科学
量子效率
氟化物
光电子学
分析化学(期刊)
化学
纳米技术
无机化学
有机化学
作者
Chang Chen,Wanggui Ye,Chuandong Zuo,Yingkui Li,Zicheng Wen,Linghua Guo,Yongge Cao,Chensheng Ma
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2023-10-20
卷期号:11 (44): 15887-15897
标识
DOI:10.1021/acssuschemeng.3c03955
摘要
A facile and eco-friendly ethanol-thermal method has been developed to improve the moisture resistance and luminescence efficiency of Mn4+-activated fluoride phosphors using oleylamine (OAm) as an organic coating layer. The luminescence efficiency of K2SiF6:Mn4+ phosphors was significantly enhanced after coating with the internal quantum efficiency increasing from 86.2 to 94.2%. Additionally, after being soaked in deionized water, the luminescence intensity of KSFM@OAm remained at 85.2% of its initial value, while that of non-coated KSFM decreased to 15.4%. This is due to the formation of a complete and uniform OAm coating layer that isolates KSFM crystals from humidity in the environment by forming bi-hydrogen bonds (−N–H···F) between −NH2 in OAm and fluorine-terminal groups in KSFM. White light-emitting devices fabricated with commercial Y3Al5O12:Ce3+ and OAm-coated KSFM exhibit bright white light with an excellent correlated-color temperature (CCT = 4546 K), color rendering index (Ra = 89.7 and R9 = 85), luminous efficiency (LE = 155.1 lm/W), and color stability (ΔE = 6.1 × 10–3), indicating that OAm-coated KSFM may be a promising red phosphor for WLEDs.
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