Red phosphor K_2LiAlF_6:Mn^(4+) has been synthesized by a cation-exchange method in HF solution. To optimize their optical properties, phosphors were synthesized using different reaction conditions. The K_2LiAlF_6:0.5...Red phosphor K_2LiAlF_6:Mn^(4+) has been synthesized by a cation-exchange method in HF solution. To optimize their optical properties, phosphors were synthesized using different reaction conditions. The K_2LiAlF_6:0.5%Mn^(4+) synthesized at 20℃ for4 h shows the highest luminescence intensity. The temperature-dependent emission intensity of the phosphor was investigated,and it was found to exhibit good thermal stability, making it a promising red phosphor candidate for warm WLEDs.展开更多
基金the National Basic Research Program of China(Grant No.2014CB643801)the National Natural Science Foundation of China(Grant Nos.51572302 and 21271191)+4 种基金the Joint Funds of the National Natural Science Foundation of China and Guangdong Province(Grant No.U1301242)Teamwork Projects of Guangdong Natural Science Foundation(Grant No.S2013030012842)Guangdong Science&Technology Project(Grant No.2015B090926011)the Natural Science Foundation of Guangdong Province(Grant No.2014A030313114)China Postdoctoral Science Foundation(Grant No.2014M562237)
文摘Red phosphor K_2LiAlF_6:Mn^(4+) has been synthesized by a cation-exchange method in HF solution. To optimize their optical properties, phosphors were synthesized using different reaction conditions. The K_2LiAlF_6:0.5%Mn^(4+) synthesized at 20℃ for4 h shows the highest luminescence intensity. The temperature-dependent emission intensity of the phosphor was investigated,and it was found to exhibit good thermal stability, making it a promising red phosphor candidate for warm WLEDs.