期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 693, 期 -, 页码 315-325出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.09.203
关键词
Red phosphor; Photoluminescence; Li2MgTi3O8:Mn4+
资金
- National Natural Science Foundation of China [21471038]
- Science and Technology Planning Projects of Guangdong Province, China [2015B010114007]
We describe the preparation of a novel red-emitting Li2MgTi3O8:Mn4+ nanocrystalline phosphor by a soft chemical method. Li2MgTi3O8:Mn4+ phosphor gained our attention and interest due to its low-cost and unique luminescent properties. The deep red emission from Li2MgTi3O8: Mn4+ shows an abnormal broad band at 680 nm, with a quantum efficiency (QE) of 34%, and good thermal resistance of Delta E = 0.214 eV Li2MgTi3O8:Mn4+ phosphor exhibits the most intense excitation absorption in the blue region which matches the emission wavelength of the blue LEDs, indicating its potential to enhance the color rendering performance of white LEDs. The deep red emission originates from the E-2(g) -> (4)A(2g) transition of Mn4+. The spectral features are well explained by the Tanabe-Sugano diagram, with crystal-field and Racah parameters of Dq = 2.06 x 10(3) cm(-1), B = 0.76 x 10(3) cm(-1) and C = 3.00 x 10(3) cm(-1). A device was fabricated in which this red phosphor Li2MgTi3O8:Mn4+ was used to coat the blue LEDs. The fabricated device demonstrated that the prepared material can act as a novel potential red phosphor for warm white LEDs. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据