A red emitting stoichiometric phosphor Sr2Ga3La1−x
            Eu
                x
            Ge3O14 for white light emitting diodes

Wang, Qiang; Mu, Zhongfei; Zhu, Daoyun; Feng, Jing; Liang, Zehui; Yang, Lurong; Cai, Xingyi; Lü, Jinfeng; Wu, Fugen

doi:10.1007/s10854-017-7488-z

Cited by 10 publications

(1 citation statement)

References 30 publications

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“…Globally, a significant portion of phosphors is utilized for developing white light-emitting diodes (WLEDs) for general lighting purposes. The most widely used protocol for developing WLED is to coat a yellow emitting phosphor (YAG:Ce) over a blue InGaN chip so that they can collectively generate white light. − However, this approach has a serious drawback, i.e., the red spectral deficiency leading to the low CRI of the generated white emission. As an alternative approach, a near-UV LED chip is often employed to excite a proper blend of tricolor (blue, green, and red) phosphors so that they can generate white light.…”

Section: Introductionmentioning

confidence: 99%

ZnAl₂O₄:Eu³⁺ Nanoparticle Phosphors Co-doped with Li⁺ for Red Light-Emitting Diodes

Samanta

Dey

et al. 2021

ACS Appl. Nano Mater.

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In recent years, rare-earth doped phosphors have gathered immense attention in the luminescence field for lighting and electronic display applications. However, the unavailability of an efficient and low-cost red phosphor is a major challenge for the widespread deployment of white light-emitting diodes (WLEDs) for practical purposes. Here we report red light-emitting Li+ co-doped ZnAl2O4:Eu3+ nanophosphors synthesized by a modified sol–gel route. These nanophosphors show excellent red emission due to the 5D0 → 7F j (j = 1, 2, 3, and 4) transition of Eu3+ ions under 394 nm excitation. Li+ co-doped ZnAl2O4:Eu3+ nanophosphors exhibit an almost 2-fold increase in photoluminescence (PL) intensity upon incorporation of the optimum amount of Li+ in the ZnAl2O4:Eu3+ matrix. Apart from that, Li+ co-doping leads to the improvement of CIE coordinates that is also reflected from the enhanced color purity offered by the co-doped nanophosphors. Steady-state as well as time-resolved PL spectra clearly reveal that addition of Li+ co-activator successfully reduces nonradiative transitions in the co-doped nanophosphors. Introduction of Li+ in Eu3+ doped ZnAl2O4 effectively neutralizes the charge imbalance problem and thus leads to a significant increase in the PL efficiency of the nanophosphors. The red LED fabricated by those co-doped nanophosphors exhibits strong red emission under a driving voltage of 3 V. Obtained results strongly highlight the bright prospect of Li+ co-doped ZnAl2O4:Eu3+ nanophosphors in the LED and display applications.

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Section: Introductionmentioning

confidence: 99%

ZnAl₂O₄:Eu³⁺ Nanoparticle Phosphors Co-doped with Li⁺ for Red Light-Emitting Diodes

Samanta

Dey

et al. 2021

ACS Appl. Nano Mater.

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Adjusting the structure and luminescence properties of Sr_2−xBa_xMgAl₂₂O₃₆:Eu²⁺ phosphors by Sr:Ba ratio

Zhang

et al. 2018

Luminescence

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Europium ion (Eu2+)‐doped phosphors exhibit adjustable photoluminescence due to the sensitivity of their luminescence to the local environment. It is of great significance to adjust the luminescence of Eu2+ by changing their local environment in the host. In this work, we investigated the effect of strontium/barium (Sr:Ba) ratio on the structure and luminescence properties of Sr2−xBaxMgAl22O36:Eu2+ phosphors. Our investigation indicates that with the decrease of Sr:Ba ratio, the matrix lattice gradually expands and the peak wavelength for the luminescence of Eu2+ presents an obvious blue shift. The occupancy of Eu2+ was analyzed and the reason for the blue shift was explained. Thermal stability for the luminescence of Eu2+ can also be adjusted by changing the Sr:Ba ratio. This work has a positive effect on the regulation of the emission of phosphors and the improvement of thermal stability, which will promote the application of Sr2−xBaxMgAl22O36:Eu2+ phosphors in the field of white light emitting diodes.

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Preparation and Luminescence Properties of Ca9NaZn(PO4)7:Dy3+ Single-Phase White Light-Emitting Phosphor

Zhu

Liao

et al. 2018

Journal of Elec Materi

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A red emitting stoichiometric phosphor Sr2Ga3La1−x Eu x Ge3O14 for white light emitting diodes

Cited by 10 publications

References 30 publications

ZnAl₂O₄:Eu³⁺ Nanoparticle Phosphors Co-doped with Li⁺ for Red Light-Emitting Diodes

ZnAl₂O₄:Eu³⁺ Nanoparticle Phosphors Co-doped with Li⁺ for Red Light-Emitting Diodes

Adjusting the structure and luminescence properties of Sr_2−xBa_xMgAl₂₂O₃₆:Eu²⁺ phosphors by Sr:Ba ratio

Preparation and Luminescence Properties of Ca9NaZn(PO4)7:Dy3+ Single-Phase White Light-Emitting Phosphor

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A red emitting stoichiometric phosphor Sr2Ga3La1−x Eu x Ge3O14 for white light emitting diodes

Cited by 10 publications

References 30 publications

ZnAl2O4:Eu3+ Nanoparticle Phosphors Co-doped with Li+ for Red Light-Emitting Diodes

ZnAl2O4:Eu3+ Nanoparticle Phosphors Co-doped with Li+ for Red Light-Emitting Diodes

Adjusting the structure and luminescence properties of Sr2−xBaxMgAl22O36:Eu2+ phosphors by Sr:Ba ratio

Preparation and Luminescence Properties of Ca9NaZn(PO4)7:Dy3+ Single-Phase White Light-Emitting Phosphor

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Product

Resources

About

ZnAl₂O₄:Eu³⁺ Nanoparticle Phosphors Co-doped with Li⁺ for Red Light-Emitting Diodes

ZnAl₂O₄:Eu³⁺ Nanoparticle Phosphors Co-doped with Li⁺ for Red Light-Emitting Diodes

Adjusting the structure and luminescence properties of Sr_2−xBa_xMgAl₂₂O₃₆:Eu²⁺ phosphors by Sr:Ba ratio