【作者】 周敬敬； 费良浩； 石建新； 张吉林； 龚孟濂；

【Author】 JingjingZhou Lianghao Fei Jinxin Shi~* Jilin Zhang Menglian Gong (School of Chemistry and Chemical Engineering,Sun Yat-sen University, Guangzhou 510275,China)

【机构】 中山大学；

【摘要】 本文采用高温固相法制备了一系列Eu³⁺激活的Ca₂Sr（PO₄）₂系列红色荧光粉,利用X-射线粉末衍射对其物相结构进行了表征,并通过荧光光谱等详细研究了荧光粉的发光性质,找出了其最佳发光浓度,最后选取发光效果最好的Ca₂Sr_0.7（PO₄）₂:0.3Eu³⁺荧光粉样品与InGaN（～395 nm）芯片结合制备了相应的LED器件。结果表明:该系列荧光粉,在一定掺杂浓度范围内,为单一纯相;在394 nm光激发下,其发射峰位于616 nm,可用于近紫外激发的白光LED的制备。更多还原

【Abstract】 In this paper,a series of Ca₂Sr（PO₄）2-based phosphors activated by Eu³⁺ were prepared by traditional solid state reactions.Their structures were characterized by XRD and their photo-luminescent properties were investigated.XRD analysis showed that the synthesized products were all pure-phase in a Eu³⁺-doped range of 5% 45%.Under excitation of 394 nm-light,the phosphor exhibited strong red-emission peaking at 616 nm.An LED was fabricated with the red phosphor coated onto an ³95 nm-emitting InGaN chip.All the results indicate that Ca₂Sr（PO₄）₂:Eu³⁺ is a promising candidate as ultraviolet light excitable red phosphor for applications in white LEDs.更多还原