温州大学化学与材料工程学院

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祝贺梁晓娟和向卫东老师指导研究生周磊在Journal of Alloys and Compounds上发表学术论文

发布时间:2018-11-30    来源:化学与材料工程学院    作者:    点击次    [点击关闭]

标题(中文):Be2+, Mg2+, Sr2+, Ba2+增强Mn4+:Y3Al5O12红色荧光粉

标题(英文):Enhanced luminescence performances of Mn4+:Y3Al5O12 red phosphor by ions of Rn2+ (Be2+, Mg2+, Sr2+, Ba2+)

刊物名称及期号、页码:Journal of Alloys and Compounds 769 (2018) 686-693.

作者姓名(中文):周磊 沈晨阳 沈琳俐 刘圣男 柳建明 丁玲 杜洁丽 向卫东 梁晓娟

作者姓名(英文):Lei Zhou, Chenyang Shen, Linli Shen, Shengnan Liu, Jianming Liu, Ling Ding, Jieli Du, Weidong Xiang**, Xiaojuan Liang*

摘要(英文):In recent times, white-light emitting diodes (W-LEDs) have been widely used as light sources. However, most of the commercial lamps lack the red-light component. Herein, study on a novel blue-light activated alkaline earth ion doped Mn4+:Y3Al5O12(Mn4+:YAG) phosphor, exhibiting a strong red emission that is attributed to the Mn4þ: 2Eg/4A2g spin-forbidden transition in the 650e750 nm spectral region, that can be excited by both near-ultraviolet and blue chips is presented. The dopants Be2+, Mg2+, Sr2+, and Ba2+ were found to be significantly beneficial for enhancing Mn4þ luminescence, the related mechanism is systematically discussed here. In addition, the concentration quenching is systematically investigated. The crystal field strength (Dq) and the Racah parameters (B and C) are carefully calculated. After incorporating Mn4+/Be2+:YAG phosphors (glass ceramics) and GaAG phosphors into a blue LED device, white light with a high color rendering index and a low correlated color temperature is successfully obtained. Therefore, the Mn4+/Be2+:YAG phosphor can serve as color converter for application in W-LED.

研究现状(中文):近年来,白光发光二极管(W-LED)作为光源得到了广泛的应用.然而,大多数商业灯具缺乏红色成分.本文介绍了一种用碱土金属离子掺杂Mn4+:Y3Al5O12(Mn4+:YAG)荧光粉,它具有强烈的红色发射,可被近紫外和蓝光激发。研究发现Be2+、Mg2+、Sr2+和Ba2+能提高Mn4+:YAG发光性能,文章中又对其机理进行了系统的探讨。

创新点(中文):1用碱土金属掺杂提高Mn4+:YAG的发光性能。

2.选择出发光性能最好的Mn4+:YAG与商用荧光粉复合得到白光LED

3.用玻璃与荧光粉复合,提高Mn4+:YAG的稳定性。

原文链接:https://doi.org/10.1016/j.jallcom.2018.08.055