荧光粉
分析化学(期刊)
光致发光
兴奋剂
发光
热重分析
差热分析
材料科学
离子
傅里叶变换红外光谱
化学
衍射
光学
光电子学
有机化学
物理
色谱法
作者
Sadaf Gauhar M. Mushtaque,Vijay B. Pawade,S.J. Dhoble
出处
期刊:Luminescence
[Wiley]
日期:2023-03-21
卷期号:38 (4): 469-476
摘要
Abstract The luminescent properties and energy transfer (ET) mechanism in the Ln 3+ pair of the RE 3+ (RE = Eu 3+ , Ce 3+ , Dy 3+ and Sm 3+ ) doped K 4 Ca(PO 4 ) 2 phosphor were successfully investigated using a conventional high‐temperature solid‐state reaction. In the near infrared (NIR) range, Ce 3+ ‐doped K 4 Ca(PO 4 ) 2 phosphor exhibited a UV–Vis. emission band, whereas K 4 Ca(PO 4 ) 2 :Dy 3+ exhibited characteristic emission bands centred at 481 and 576 nm in the near‐ultraviolet excitation range. The possibility of ET from Ce 3+ to Dy 3+ in K 4 Ca(PO 4 ) 2 phosphor was confirmed by a significant increase in the photoluminescence intensity of the Dy 3+ ion based on the spectral overlap of acceptor and donor ions. X‐ray diffraction, Fourier‐transform infrared and thermogravimetric analysis/differential thermal analysis TGA/DTA were carried out to study phase purity, presence of functional groups and amount of weight loss under different temperature regimes. Therefore, the RE 3+ ‐doped K 4 Ca(PO 4 ) 2 phosphor may be a stable phosphor host for light‐emitting diode applications.
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