A novel green phosphor Sr8ZnY(PO4)7:Eu2+, Ln3+ (Ln = Pr, Tm, Yb) with broad emission band for high color rendering white-lighting-emitting diodes
A novel green phosphor Sr8ZnY(PO4)7:Eu2+, Ln3+ (Ln = Pr, Tm, Yb) with broad emission band for high color rendering white-lighting-emitting diodes
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一种新型绿色荧光粉Sr8ZnY(PO4)7:Eu2 , Ln3 (Ln = Pr, Tm, Yb)，具有宽发射带，适用于高显色白光发光二极管
DOI：
10.1016/j.jlumin.2019.116600
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发表时间：
2019-10
影响因子：
3.6
通讯作者：
Zhi Zhou
中科院分区：
文献类型：
--
作者：
Yuan Zhong;Shujie Gai;Yimei Yang;Mao Xia;Ye Zhang;Fanshan Qiu;Fang Xiang;Zhi Zhou
绿色磷光体是磷光体转换的白色发光二极管（pc-LED）中的基本组分。采用水热法合成了一种新型的磷酸盐绿色荧光粉Sr 8 ZnY（PO 4）7：Eu 2+（SZYP：Eu 2+）。系统地研究了SZYP：Eu ~（2+）的晶体结构、光致发光性能和热稳定性。SZYP：Eu ~（2+）在220 ~ 550 nm范围内可被n-UV光有效激发，并显示出中心位于520 nm的宽发射带，半峰全宽为0.86 nm。确定了Eu 2+的最佳掺杂浓度为0.02 mol.随着Eu ~（2+）含量的增加，发射光谱发生了约4 nm的微弱红移。SZYP：Eu 2+也显示出相当的热稳定性（在150 °C下为45%），并且通过分别与Pr 3+、Tm 3+和Yb 3+共掺杂，其可以进一步变化至44%、40%和51%。掺杂SZYP：Eu 2+的白色LED器件显示出优异的电致发光。(EL)特性.低相关色温（4791 K）和低显色指数（95.8）意味着该荧光粉在高质量白色LED中有潜在的应用。
Green phosphor is an essential component in phosphor-converted white light-emitting diodes (pc-LEDs). Herein,.a novel green-emitting phosphate phosphor Sr8ZnY(PO4)7:Eu2+ (SZYP:Eu2+) was synthesized through hydrothermal.reaction method. The crystal structure, photoluminescence properties as well as thermal stability of.SZYP:Eu2+ were investigated systematically. SZYP:Eu2+ can be efficiently excited by n-UV light in the range.from 220 to 550 nm and shows a broad emission band centered at 520 nm with a full width at half maximum of.86 nm. The optimized doping concentration of Eu2+ was determined to be 0.02 mol. With the increase of Eu2+.content, a subtle red shift about 4 nm in emission spectra was detected. SZYP:Eu2+ also shows comparable.thermal stability (45% at 150 °C) and it can be further varied to 44, 40 and 51% by co-doping with Pr3+, Tm3+.and Yb3+, respectively. The white LED device blended with SZYP:Eu2+ shows excellent electroluminescence.(EL) properties. The low correlated color temperature (4791 K) and ultrahigh color rendering index (95.8) imply.that this phosphor may find a potential application in high-quality white LEDs.
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