A series of Tm^3+/Dy^3+co-doped Ba3 LaNa(PO4)3 F(BLNPF) phosphors were synthesized successfully via a high-temperature solid-reaction,and luminescence properties were investigated.Upon near violet excitation,BLNPF:Tm^...A series of Tm^3+/Dy^3+co-doped Ba3 LaNa(PO4)3 F(BLNPF) phosphors were synthesized successfully via a high-temperature solid-reaction,and luminescence properties were investigated.Upon near violet excitation,BLNPF:Tm^3+,Dy^3+ phosphors exhibit Tm^3+:^1D2-^3 F4 and Dy^3+:^4 F(9/2)-^6 HJ(J=15/2,13/2,11/2)transitions with diffe rent luminescence intensity.The emitting color of the obtained products was found to shift from blue to white as a result of efficient energy transfer(ET) from Tm^3+to Dy^3+ions.According to photoluminescence emission intensity,the positive effect of activator on ET efficiency was calculated and the maximum ET efficiency was found around 72.6% with Dy^3+ concentration was 0.04.By means of Dexter's theoretical model,furthermore,dipole-dipole interaction was confirmed as the mechanism of energy transfer from Tm^3+ to Dy^3+ ions.The results suggested that BLNPF:Tm^3+,Dy^3+ phosphor might be a promising single-phased white-light-emitting phosphor for UV white-light LED.展开更多
LANA MARKS是唯一一个专注于高端稀有皮革饰品的国际奢侈品品牌,以缤纷绚丽的色彩和时尚的设计闻名。她的设计被众多皇室政要、社会名流、影视明星奉若至宝。客户包括戴安娜王妃、卡拉·布鲁尼,劳拉·布什、安吉利娜·茱丽...LANA MARKS是唯一一个专注于高端稀有皮革饰品的国际奢侈品品牌,以缤纷绚丽的色彩和时尚的设计闻名。她的设计被众多皇室政要、社会名流、影视明星奉若至宝。客户包括戴安娜王妃、卡拉·布鲁尼,劳拉·布什、安吉利娜·茱丽、海伦·米伦、詹妮佛·安妮斯顿、凯特·温斯莱特、麦当娜、桑德拉·布洛克、茱丽、克利斯蒂、查理兹·塞隆、莎拉·杰西卡·帕克等。展开更多
Lana marks的血统中流淌着皇室和明星的DNA,从她诞生那一刻开始,就成了红毯明星的宠儿。好莱坞明星们纷纷将她当做奥斯卡幸运符,在她进入中国后,也成为中国女明星的宠物。李冰冰、张静初和秦海璐,分别带着她走上戛纳、好莱坞等著名的星...Lana marks的血统中流淌着皇室和明星的DNA,从她诞生那一刻开始,就成了红毯明星的宠儿。好莱坞明星们纷纷将她当做奥斯卡幸运符,在她进入中国后,也成为中国女明星的宠物。李冰冰、张静初和秦海璐,分别带着她走上戛纳、好莱坞等著名的星光大道,Lana marks陪着她们的女主人,花般绽放。展开更多
文摘A series of Tm^3+/Dy^3+co-doped Ba3 LaNa(PO4)3 F(BLNPF) phosphors were synthesized successfully via a high-temperature solid-reaction,and luminescence properties were investigated.Upon near violet excitation,BLNPF:Tm^3+,Dy^3+ phosphors exhibit Tm^3+:^1D2-^3 F4 and Dy^3+:^4 F(9/2)-^6 HJ(J=15/2,13/2,11/2)transitions with diffe rent luminescence intensity.The emitting color of the obtained products was found to shift from blue to white as a result of efficient energy transfer(ET) from Tm^3+to Dy^3+ions.According to photoluminescence emission intensity,the positive effect of activator on ET efficiency was calculated and the maximum ET efficiency was found around 72.6% with Dy^3+ concentration was 0.04.By means of Dexter's theoretical model,furthermore,dipole-dipole interaction was confirmed as the mechanism of energy transfer from Tm^3+ to Dy^3+ ions.The results suggested that BLNPF:Tm^3+,Dy^3+ phosphor might be a promising single-phased white-light-emitting phosphor for UV white-light LED.
