Thumbnail
Access Restriction
Open

Author Li, Ting ♦ Li, Panlai ♦ Fu, Nian ♦ Wang, Zhijun ♦ Xu, Shuchao ♦ Bai, Qiongyu ♦ Yang, Zhiping
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ BARIUM COMPOUNDS ♦ BORATES ♦ CERIUM IONS ♦ DOPED MATERIALS ♦ DYSPROSIUM IONS ♦ ELECTRIC DIPOLES ♦ ENERGY TRANSFER ♦ EUROPIUM IONS ♦ EXPERIMENTAL DATA ♦ LIGHT EMITTING DIODES ♦ LITHIUM COMPOUNDS ♦ PHOSPHORS ♦ QUANTUM EFFICIENCY ♦ TEMPERATURE RANGE 0400-1000 K
Abstract A series of Dy{sup 3+}, Ce{sup 3+}/Dy{sup 3+}, Eu{sup 2+}/Dy{sup 3+} and Ce{sup 3+}/Eu{sup 2+}/Dy{sup 3+} doping LiBaB{sub 9}O{sub 15} (LBB) phosphors were synthesized via a high temperature solid-state method. LBB:Dy{sup 3+} cannot create light under ultraviolet radiation, however, LBB:Ce{sup 3+}, Dy{sup 3+} can produce yellow emission under 295 nm excitation. The energy transfer occurs from Ce{sup 3+} to Dy{sup 3+} ions via electric dipole-dipole interaction and the critical distance is estimated to be 21.15 Å based on concentration quenching model. Generally, Eu{sup 2+} ion is a sensitizer to Dy{sup 3+} ion, however, there is only the emission of Eu{sup 2+} in LBB:Eu{sup 2+}, Dy{sup 3+}, which means there is no energy transfer from Eu{sup 2+} to Dy{sup 3+} ions. Interestingly enough, when doping Eu{sup 2+} ion into LBB:Ce{sup 3+}, Dy{sup 3+}, white emission can be achieved by increase the blue (350–425 nm) emission intensity. The spectral property, quantum efficiency, CIE chromaticity coordinates and thermal quenching property of LBB:Ce{sup 3+}, Eu{sup 2+}, Dy{sup 3+} are investigated. The results indicate that LBB:Ce{sup 3+}, Eu{sup 2+}, Dy{sup 3+} may be a potential application to white light emitting diodes. - Graphical abstract: LBB:Ce{sup 3+}, Dy{sup 3+} can create white emission by doping Eu{sup 2+} ions. - Highlights: • LBB:Ce{sup 3+}, Dy{sup 3+} can produce white emission by doping Eu{sup 2+} ion. • There is no energy transfer from Eu{sup 2+} to Dy{sup 3+} ions. • Energy transfer occurs from Ce{sup 3+} to Dy{sup 3+} ions. • LBB:Ce{sup 3+}, Eu{sup 2+}, Dy{sup 3+} may be a potential application for white LEDs.
ISSN 00224596
Educational Use Research
Learning Resource Type Article
Publisher Date 2017-04-15
Publisher Place United States
Journal Journal of Solid State Chemistry
Volume Number 248


Open content in new tab

   Open content in new tab