Enhanced emission from thermally stable Eu3+ doped CaB2Si2O8 red phosphors via alkali metal modification for W-LEDs application

Liu, Xueyun; Shen, Bingqing; Chen, Baojiu; Zhang, Yuanpeng; Hu, Jianxu

doi:10.1016/j.optmat.2019.109353

Cited by 12 publications

(5 citation statements)

References 38 publications

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“…The activation energy (Δ E ) of phosphors could be derived from the temperature-dependence spectra by using the Arrhenius equation: 61,65,67,68 where I 0 is the initial emission intensity of the phosphor at room temperature, I T is the emission intensity at T in K, c is a constant, Δ E is the activation energy for thermal quenching, and k is the Boltzmann constant (8.617 × 10 −5 eV K −1 ). Accordingly, as depicted in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Highly efficient green-emitting ZnO:Cu²⁺ phosphors for NUV-pumped white-emitting diodes

Tran¹,

Trung²,

Tuân³

et al. 2023

Dalton Trans.

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Section: Resultsmentioning

confidence: 99%

“…11b, which is higher than that obtained in some previous reports. 65,66 The activation energy (ΔE) of phosphors could be derived from the temperature-dependence spectra by using the Arrhenius equation: 61,65,67,68…”

Section: Paper Dalton Transactionsmentioning

confidence: 99%

Highly efficient green-emitting ZnO:Cu²⁺ phosphors for NUV-pumped white-emitting diodes

Tran¹,

Trung²,

Tuân³

et al. 2023

Dalton Trans.

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“…The spectra showed a sharp peak at 465 nm in the excitation spectra and this peak was dominant in the spectra. [ 36 ]…”

Section: Resultsmentioning

confidence: 99%

ZnWO₄:Eu³⁺ phosphor with intense blue LED excitation: photoluminescence and electron density distribution analysis

et al. 2020

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A high intensity 464 nm excitable ZnWO4:Eu3+ red‐emitting phosphor for warm white lighting applications was prepared using a solid‐state reaction method by varying the dopant Eu3+ concentration. Crystalline purity and phase identification was confirmed and revealed using powder X‐ray diffraction and Rietveld refinement analysis. The surface morphology of Zn1‐xEuxWO4 (x = 0, 0.01, 0.02, 0.03, 0.04 and 0.05) was examined using scanning electron microscopy (SEM) techniques. From SEM analysis, the ZnWO4:Eu3+ phosphor prepared at 1–3% molar Eu3+ concentrations exhibited a small pebble‐like morphology with a smooth surface. On increasing the molar concentration of Eu3+ to >3%, the pebble stone morphology disappeared and a large, smooth irregular polygon‐shaped granular‐like morphology was obtained. Of the higher mol% Eu3+, the 4% Eu3+‐doped ZnWO4 showed the best photoluminescence properties with high intensity and sharp excitation at 395 and 464 nm, followed by red emission centred at 615 nm with excellent CIE coordinates (x = 0.58 and y = 0.41) in the core red region. Elemental composition and chemical state analysis were carried out for the 4% Eu3+‐doped ZnWO4 phosphor using X‐ray photoelectron spectroscopy and energy dispersive X‐ray spectroscopy studies. Based on all the above analyses, the Eu3+‐doped ZnWO4 phosphor was found to be a very efficient red‐emitting phosphor under near‐UV light as well as under visible light excitation and could be used for white LED and field emissive displays applications.

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“…By co-doping with alkali ions, Liu et al could stabilize Eu 3+ . [158] The typical red emission of Eu 3+ could be excited by f-f transitions as well as a CT band at $255 nm. Application for LED lamps based on an NUV 365 nm chip was explored.…”

Section: Aeb 2 Si 2 Omentioning

confidence: 99%

Luminescent inorganic mixed borate phosphors materials for lighting

Tawalare¹

2022

Luminescence

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The need of new materials with desirable optical properties has become important in recent years. In particular, a need has emerged for compounds having better luminescence properties in various practical applications. The introduction of rare earth ions as activators improves the luminescence properties of the compounds considerably. Boron is one of the most abundant elements in nature. It readily combines with almost all other elements. In combination with oxygen; it forms borates comprised of various anions such as BO33−, B2O54−, etc. Apart from these simple borates, several complex compositions exist involving mixed anions as well as double metal borates, due to the three‐fold, or four‐fold coordination of borate atoms. Borates intrinsically possesses characteristics that are advantageous for optical materials, which include a wide transparency range, large electronic band gap, good thermal and chemical stability, low preparative temperature, optical stability with good nonlinear characteristics, and an exceptionally high optical damage threshold. The unique crystal structure of borates determines their enhanced ultraviolet light transparency, good nonlinearity, and relatively high resistance against laser‐induced damage. Some of these complex borates have interesting luminescence properties that are covered in this review. These include double borates containing rare earths RM3(BO3)4, pentaborates LaMgB5O10, M3R2(BO3)4, where M is an alkaline earth, mixed anion borates such as aluminoborate SrAl2B2O7, silicate‐borates such as pekovite, SrB2Si2O8, haloborates, M2B5O9X, where M is an alkaline earth and X is a halogen, phosphate borates, and MBPO5, where M is an alkaline earth. Phosphors based on these compositions find use in various applications such as fluorescence lamps, colour TVs, plasma display panels, high‐intensity discharge lamps based on xenon, optically pumped solid‐state lasers, eye‐safe lasers, and X‐ray imaging.

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Enhanced emission from thermally stable Eu3+ doped CaB2Si2O8 red phosphors via alkali metal modification for W-LEDs application

Cited by 12 publications

References 38 publications

Highly efficient green-emitting ZnO:Cu²⁺ phosphors for NUV-pumped white-emitting diodes

Highly efficient green-emitting ZnO:Cu²⁺ phosphors for NUV-pumped white-emitting diodes

ZnWO₄:Eu³⁺ phosphor with intense blue LED excitation: photoluminescence and electron density distribution analysis

Luminescent inorganic mixed borate phosphors materials for lighting

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Enhanced emission from thermally stable Eu3+ doped CaB2Si2O8 red phosphors via alkali metal modification for W-LEDs application

Cited by 12 publications

References 38 publications

Highly efficient green-emitting ZnO:Cu2+ phosphors for NUV-pumped white-emitting diodes

Highly efficient green-emitting ZnO:Cu2+ phosphors for NUV-pumped white-emitting diodes

ZnWO4:Eu3+ phosphor with intense blue LED excitation: photoluminescence and electron density distribution analysis

Luminescent inorganic mixed borate phosphors materials for lighting

Contact Info

Product

Resources

About

Highly efficient green-emitting ZnO:Cu²⁺ phosphors for NUV-pumped white-emitting diodes

Highly efficient green-emitting ZnO:Cu²⁺ phosphors for NUV-pumped white-emitting diodes

ZnWO₄:Eu³⁺ phosphor with intense blue LED excitation: photoluminescence and electron density distribution analysis