Abstract
In this work, a series of red emitting Lu3Te2Li3O12: Eu3+ phosphors were synthesized for the first time by high temperature solid state reaction. The structure was characterized by X-ray diffraction. The excitation spectra, emission spectra and CIE chromaticity coordinate were studied. The phosphors show strong red emission at 611 nm due to the 5D0-7F2 transition of Eu3+ ions. The optimal doping concentration of Eu3+ in LTL host is x = 0.5 due to the concentration quenching mechanism of dipole-dipole interaction. The CIE chromaticity coordinates of the LTL: 0.5Eu3++ phosphor is (0.644,0.355), and the purity of the color is up to 93.61%. The phosphor can be considered as a potential red-emitting candidate for near UV WLEDs.
Highlights
With the continuous enhancement of people's awareness, the exploration of new technologies to meet these needs has become a research hotspot in the field of lighting. [14] In the past decades, white light emitting diodes (WLEDs) have been considered as the generation of solid-state light sources due to their advantages of energy saving, environmental protection and long life
The results show that, Lu3Te2Li3O12: xEu3+ phosphors with high color purity have broad application prospects for UVpumped WLEDs
All of the patterns are consistent with Lu3Te2Li3O12 (PDF#26-1170) in the International Centre for Diffraction Data (ICDD) database, which exhibited as garnet-type structure and correspond to the Ia 3d space group of the cubic system
Summary
With the continuous enhancement of people's awareness, the exploration of new technologies to meet these needs has become a research hotspot in the field of lighting. [14] In the past decades, white light emitting diodes (WLEDs) have been considered as the generation of solid-state light sources due to their advantages of energy saving, environmental protection and long life. [14] In the past decades, white light emitting diodes (WLEDs) have been considered as the generation of solid-state light sources due to their advantages of energy saving, environmental protection and long life. The commercial way to produce white light is to combine blue light chip (InGaN) with yellow phosphor Y3Al5O12: Ce3+(YAG: Ce3+). The combination of near ultraviolet (n-UV) LED chips and red-, greenand blue-emitting phosphors to obtain warm white light become an effective way to solve the above problem. The existing commercial red phosphors, such as nitrides or sulfides, have either harsh synthesis conditions or poor chemical stability. The results show that, Lu3Te2Li3O12: xEu3+ phosphors with high color purity have broad application prospects for UVpumped WLEDs
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