Yellow Emission from Low Coordination Site of Sr2SiO4:Eu2+, Ce3+: Influence of Lanthanide Dopants on the Electron Density and Crystallinity in Crystal Site Engineering Approach

doi:10.1002/chem.201803232

	Yellow Emission from Low Coordination Site of Sr2SiO4:Eu2+, Ce3+: Influence of Lanthanide Dopants on the Electron Density and Crystallinity in Crystal Site Engineering Approach
	Mani, Rajaboopathi 1; Gupta, Santosh Kumar 2,3; Ghosh, Partha Sarathi 4; Jiang, Huaidong1,5
	2018-10-26
发表期刊	CHEMISTRY-A EUROPEAN JOURNAL (IF:3.9[JCR-2023],4.1[5-Year])
ISSN	0947-6539
卷号	24 期号:60 页码:16149-16159
发表状态	已发表
DOI	10.1002/chem.201803232
摘要	Lanthanide doping through a crystal site engineering approach tunes the emission wavelength suitable for LED applications, but weak emission from low coordination sites remains a huge challenge. Herein the use of a sensitizer is reported to enhance the emission strength and unravel the crystallinity and phase, as this approach demands a large amount of dopants. Doping of Eu2+ ions at SrO10 and SrO9 sites of Sr2SiO4 (S2S), respectively, tunes the emission from green to yellow and controlled doping of a Ce3+ sensitizer quadruples the quantum efficiency of yellow emission. Remarkably, doping of Eu2+ at the SrO9 site produces polycrystals, whereas co-doping of Ce3+ and Eu2+ at the same site produces single crystals. DFT calculations further delineate the underlying changes wherein strong interaction of dopant with its neighbours determines the electron density, and thus the crystallinity and phase, rather than usual explanation of aliovalent conditions, which is further substantiated by TEM results. Irrespective of dopant valence, use of large amounts of dopants and their interaction with the host is responsible for the crystallinity and phase change (alpha'-S2S to beta-S2S). The XPS valence band spectra experimentally evidences the changes in bonding nature of O 2p and O 2s orbitals of silicate and its electron density, due to doping at the two sites. In short, the outcomes resulting from this work could be extended for the development of other two-coordination site lanthanide-doped materials and crystallization of inorganic materials.
关键词	crystal site engineering approaches density functional calculations microstructures sensitizers single-crystal phosphors
收录类别	SCI ; SCIE ; EI
语种	英语
资助项目	Major State Basic Research Development Program of China[2014CB910401]
WOS研究方向	Chemistry
WOS类目	Chemistry, Multidisciplinary
WOS记录号	WOS:000451908600025
出版者	WILEY-V C H VERLAG GMBH
EI入藏号	20184005900551
EI主题词	Carrier concentration ; Cerium compounds ; Density functional theory ; Electron density measurement ; Electrons ; Europium compounds ; Microstructure ; Rare earth elements ; Silicates ; Single crystals ; Strontium compounds
WOS关键词	TOTAL-ENERGY CALCULATIONS ; RED LUMINESCENCE ; IONIC-RADII ; PHASE ; PHOSPHORS ; CA2SIO4 ; NANOCRYSTALS ; TRANSITIONS ; INSIGHT ; EU2+
原始文献类型	Article
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/29091
专题	大科学中心_PI研究组_江怀东组物质科学与技术学院
通讯作者	Jiang, Huaidong
作者单位	1.Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China 2.Bhabha Atom Res Ctr Trombay, Radiochem Div, Bombay 400085, Maharashtra, India 3.Univ Texas Rio Grande Valley, Dept Chem, 1201 West Univ Dr, Edinburg, TX 78539 USA 4.Bhabha Atom Res Ctr Trombay, Mat Sci Div, Mumbai 400085, Maharashtra, India 5.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
通讯作者单位	物质科学与技术学院
推荐引用方式 GB/T 7714	Mani, Rajaboopathi,Gupta, Santosh Kumar,Ghosh, Partha Sarathi,et al. Yellow Emission from Low Coordination Site of Sr2SiO4:Eu2+, Ce3+: Influence of Lanthanide Dopants on the Electron Density and Crystallinity in Crystal Site Engineering Approach[J]. CHEMISTRY-A EUROPEAN JOURNAL,2018,24(60):16149-16159.
APA	Mani, Rajaboopathi,Gupta, Santosh Kumar,Ghosh, Partha Sarathi,&Jiang, Huaidong.(2018).Yellow Emission from Low Coordination Site of Sr2SiO4:Eu2+, Ce3+: Influence of Lanthanide Dopants on the Electron Density and Crystallinity in Crystal Site Engineering Approach.CHEMISTRY-A EUROPEAN JOURNAL,24(60),16149-16159.
MLA	Mani, Rajaboopathi,et al."Yellow Emission from Low Coordination Site of Sr2SiO4:Eu2+, Ce3+: Influence of Lanthanide Dopants on the Electron Density and Crystallinity in Crystal Site Engineering Approach".CHEMISTRY-A EUROPEAN JOURNAL 24.60(2018):16149-16159.