K2SiF6:Mn4+ red phosphors co-doped with Ti4+ were synthesized using ion exchange method.X-ray power diffraction,temperature-dependent luminescence,and photoluminescence analysis were used for characterizing the phosphors.The phosphors doped with various concentrations of Mn4+ and Ti4+ had identical well-formed face center cubic of K2SiF6.For phosphors of K2SiF6:1% Mn4+,excitation peaks located at 353nm and 455nm correspond to electron transition of 4A2→4T1 and 4A2→4T2,respectively.The peaks showed in the emission spectra(616nm,634nm,650nm) belong to the 2Eg→4A2 transition of Mn4+.Otherwise,the doping of Ti4+ in phosphors resulted in the maximum luminous intensity of phosphors at peak of 634nm increasing by about 7 times,comparing to the K2SiF6:1% Mn4+ phosphors.At the temperature of 420K,the emission intensity of K2SiF6:1% Mn4+ fell to 65.8% compared to that at room temperature,showing good thermal stability.
Mo Fuwang, Chen Qiujuan, Yang Xingling, Hu Lijun, Wei Xiaoxian
. Sythesis and luminesence property of K2SiF6∶Mn4+,Ti4+ red phosphor[J]. New Chemical Materials, 2020
, 48(9)
: 128
-132
.
DOI: 10.19817/j.cnki.issn 1006-3536.2020.09.027
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