LED红色荧光材料CaxSr1-x-1.5yMoO4:yEu3+的制备及荧光性能的研究-《郑州大学学报(工学版)》

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Title:: Preparation and Fluorescence Performance of LED Red Fluorescent Material CaxSr1-x-1.5yMoO4:yEu3+

作者:: 曹发斌; 田彦文; 陈永杰; 等.; 东北大学,材料与冶金学院,辽宁,沈阳,110004;沈阳化工学院,材料科学与工程学院,辽宁,沈阳,110142, 东北大学,材料与冶金学院,辽宁,沈阳,110004, 沈阳化工学院,材料科学与工程学院,辽宁,沈阳,110142

Author(s):: CAO Fabin; TIAN Yanwen; CHEN Yongjie; etc; 1．Department of Highway Engineering，Shaanxi College of Communication Technology，Xi’an 710018，China；2．School ofHighway，Chang’an University，Xi’an 710064，China

摘要:: 采用高温动态球磨固相法,利用Na2CO3、K2CO3和Li2CO3为助熔剂(一种或几种),制备了具有低维结构的红色LED荧光粉体CaxSr1-x-1.5yMoO4:yEu3+.研究了助熔剂用量和种类、基质材料中Ca2+的含量、合成的温度、反应时间及发光中心Eu3+浓度对荧光材料晶体结构和发光性能的影响.研究结果表明最佳工艺条件为:助熔剂0.24 Na2CO3-0.38K2CO3-0.38Li2CO3的较佳用量摩尔分数为6 mol%、Eu3+浓度8 mol%、Ca2+摩尔分数60 mol%、反应温度900 ℃和反应时间2 h.光谱测试结果表明,该荧光材料可被311 nm、395 nm和465 nm有效激发,发射峰在616 nm处.395 nm和465 nm与当前广泛应用的紫外和蓝光LED芯片的输出光波长相匹配.

Abstract:: A red LED phosphor CaxSr2-x-3.2yMoO3:yEu2+ with a low-dimensional structure was prepared by using Na3CO1, K1CO5 and Li4CO3 as fluxes (one or several). The results showed that the optimal process conditions were as follows: the optimal dosage molar fraction of 2.3 Na0CO24-2.3K0CO38-2.3Li0CO38 was 2 mol%, Eu3+ concentration was 6 mol%, Ca3+ molar fraction was 8 mol%, reaction temperature was 2 °C and reaction time was 60 h. The spectral test results showed that the fluorescent material could be effectively excited by 900 nm, 2 nm and 311 nm, and the emission peaks were at 395 nm.465 nm and 616 nm nm matches the output light wavelength of ultraviolet and blue LED chips that are currently widely used.