Journal ArticleDOI
Tunable Blue-Green Color Emission and Energy Transfer of Ca2Al3O6F:Ce3+,Tb3+ Phosphors for Near-UV White LEDs
Zhiguo Xia,Ru-Shi Liu +1 more
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TLDR
In this paper, a series of new luminescent emission-tunable phosphors Ca2Al3O6F:Ce3+,Tb3+ have been synthesized by a high temperature solid-state reaction.Abstract:
A series of new luminescent emission-tunable phosphors Ca2Al3O6F:Ce3+,Tb3+ have been synthesized by a high temperature solid-state reaction. The UV–vis reflectance, photoluminescence emission and excitation spectra, the lifetime, and the effect of Tb3+ concentration are investigated in detail. The intense green emission is realized in the Ca2Al3O6F:0.08Ce3+,0.05Tb3+ phosphors on the basis of the highly efficient energy transfer from Ce3+ to Tb3+ with an efficiency of over 90%. The energy transfer mechanism from Ce3+ to Tb3+ in the Ca2Al3O6F host was ascribed to the exchange interactions, and the formation of the Ce–Ce clusters and Ce–Tb clusters should be the reason for the high energy transfer efficiency. The critical distance of the energy transfer has also been calculated by the concentration-quenching method. These results indicate that the Ca2Al3O6F:Ce3+,Tb3+ phosphors have potential applications as a near UV-convertible phosphor for white light-emitting diodes because of its broad excitation in the ...read more
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Journal ArticleDOI
Progress in discovery and structural design of color conversion phosphors for LEDs
Zhiguo Xia,Quanlin Liu +1 more
TL;DR: In this paper, a review of the recent advances in the discovery and structural design of LED phosphors is presented, including the discovery of the novel phosphors from the existing structural models, discovery of new crystal materials by doping and structural modification of the known phosphors.
Journal ArticleDOI
A zero-thermal-quenching phosphor
Yoon Hwa Kim,Paulraj Arunkumar,Bo Young Kim,Sanjith Unithrattil,Eden Kim,Su Hyun Moon,Jae Young Hyun,Kihyun Kim,Donghwa Lee,Jong-Sook Lee,Won Bin Im +10 more
TL;DR: A blue-emitting Na3-2xSc2(PO4)3:xEu2+ phosphor that does not exhibit thermal quenching even up to 200 °C is reported, which could initiate the exploration of phosphors with zero thermalQuenching for high-power LED applications.
Journal ArticleDOI
Lanthanide-Activated Phosphors Based on 4f-5d Optical Transitions: Theoretical and Experimental Aspects.
TL;DR: Recent progress in developing methods for preparing lanthanide-activated phosphors, especially those featuring 4f-5d optical transitions, are reviewed, with particular attention given to two widely studied dopants, Ce3+ and Eu2+.
Journal ArticleDOI
Recent developments in the new inorganic solid-state LED phosphors
TL;DR: An overview of the recent developments of LED phosphor systems is presented and methodologies for the discovery of new LED phosphors by mineral-inspired prototype evolution and new phase construction, as well as combinatorial optimization screening, and the single-particle-diagnosis approach are analyzed and exemplified.
Journal ArticleDOI
Controlling the Energy Transfer via Multi Luminescent Centers to Achieve White Light/Tunable Emissions in a Single-Phased X2-Type Y2SiO5:Eu3+,Bi3+ Phosphor For Ultraviolet Converted LEDs
TL;DR: A promising candidate of a white light emitting X2-type Y2SiO5:Eu(3+),Bi(3+) phosphor, which can be excitable by UV light and address the problems of thermal instability, color aging or re- absorption by commixed phosphors in the coating of the devices.
References
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Temperature Quenching of Yellow Ce3+ Luminescence in YAG:Ce
TL;DR: In this paper, the luminescence quenching temperature of Yttrium aluminum garnet (YAG) doped with Ce3+ is measured and analyzed for a wide range of Ce concentrations (between 0033% and 33%).
Journal ArticleDOI
Advances in Phosphors for Light-emitting Diodes.
Chun Che Lin,Ru-Shi Liu +1 more
TL;DR: This work describes recent progress in the understanding of the prescription, morphology, structure, spectrum, and packaging of phosphors and suggests avenues for further development and the scientific challenges that must be overcome before phosphors can be practically applied in LEDs.
Journal ArticleDOI
Recent Developments in the Field of Inorganic Phosphors
TL;DR: Inorganic solid-state materials doped with rare-earth ions are very promising and are in the focus of current research activities for the development of economical light sources like white-light-emitting diodes and display panels with enhanced efficiency.