Synthesis and optical properties of novel apatite-type NaCa_(3)Bi(PO_(4))_(3)F:Dy^(3+)yellow-emitting fluorophosphate phosphors for white LEDs

查看全文 作　　者：Yuan [1]Wang;Guangliang [1]Lu;Yang [1]Qiu;Wen [1]Sun;Siqi [1]Qin;Yifang [1]Lin;Bin [2,3]Deng;Dan [1]zhang;Ruijin [4,5]Yu 机构地区：[1]College of Science,Northwest A&F University,Yangling 712100,China;[2]School of Chemistry and Environmental Science,Xiangnan University,Chenzhou 423043,China;[3]Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application,Xiangnan University,Chenzhou 423043,China;[4]College of Chemistry&Pharmacy,Northwest A&F University,Yangling 712100,China;[5]Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials,College of Materials and Chemical Engineering,China Three Gorges University,Yichang 443002,China 出　　处：《Journal of Rare Earths》索引2022年第40卷第12期,共11页 基　　金：Project supported by Chinese Universities Scientific Fund(2452019076,2452020017)。 摘　　要：In this study,novel yellow-emitting fluorophosphate NaCa_(3)Bi(PO_(4))_(3)F phosphors doped with different concentrations of Dy^(3+)ions were first obtained via high-temperature solid-state reaction.The crystal structure,phase purity,particle morphology,photoluminescence(PL)properties,thermal stability,and luminescence decay curves of the resulting phosphors were then characterized in detail.Under the excitation of 349 nm,the three dominant peaks of the NaCa_(3)Bi(PO_(4))_(3)F:Dy^(3+)are centered at 480 nm(^(4)F_(9/2)-^(6)H_(15/2)),577 nm(^(4)F_(9/2)-^(6)H_(13/2)),and 662 nm(^(4)F_(9/2)-^(6)H_(11/2)).The optimal doping concentration of Dy^(3+)ions in the NaCa_(3)Bi(PO_(4))_(3)F:xDy^(3+)phosphors is x=5 mol%.The phosphors show excellent thermal stability with high activation energy(Ea=0.32 eV).Eventually,the synthesized white lightemitting diode(w-LED)demonstrates the Commission International de L’Eclairage(CIE)chromaticity coordinates of(0.341,0.334),a good correlated color temperature(CCT)of 5083 K,and a high color rendering index(Ra)of 92.Revealing its potential as yellow-emitting phosphors,the feasibility of the fabricated apatite-type NaCa_(3)Bi(PO_(4))_(3)F:Dy^(3+)fluorophosphate phosphors was confirmed for wLEDs. 关 键 词：Fluorophosphate NaCa_(3)Bi(PO_(4))_(3)F Dy^(3+) Luminescence Phosphor LEDS