Emission enhancement of Eu3+-doped ZnO by adding charge compensators

Park, K.; Hakeem, D.A.; Pi, J.W.; Jung, Gregor

doi:10.1016/j.jallcom.2018.08.278

Cited by 69 publications

(17 citation statements)

References 82 publications

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“…The calculated CIE color coordinates at excitation 325 were found to be in the ranges of 0.392  x  0.536 and 0.449  y  0.315. Based on the National Television Standard Committee (NTSC) system, the ideal red-emitting CIE (Commission International de I"Eclairage) coordinates are x = 0.67 and y = 0.33 [10]. Therefore, our obtained coordinates are relatively weaker [57], but closer to those reported by Kumar et al [11] and Hasabeldaim et al [8].…”

Section: Photoluminescence Studysupporting

confidence: 84%

“…The choice of Eu 3+ ions for ZnO doping can produce either red-or orange-emitting materials in the near-ultraviolet (UV)/blue region, which is useful for developing white LED applications or for performing optoelectronic devices with red emission. Studies of Eu 3+ ‫-‬ doped ZnO have been explored by many authors [8,9] who observed an efficient red emission, confirming the incorporation of Eu ions into the ZnO host [10,11]. However, different results regarding the efficiency of the energy transfer mechanisms from ZnO to RE ions have been obtained.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Eu doped ZnO micropods prepared by chemical bath deposition on p-Si substrate

Althumairi

Baig

Kayed

et al. 2022

Vacuum

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Section: Photoluminescence Studysupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Characterization of Eu doped ZnO micropods prepared by chemical bath deposition on p-Si substrate

Althumairi

Baig

Kayed

et al. 2022

Vacuum

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“…Despite its precious technological interests, many studies on RE doped semiconductors have been conducted. The Eu 3+ ion is a representative dopant of several distinct compounds among the RE 3+ ions and the red release of Eu 3+ is thoroughly explored and extensively used for light emission systems [17][18][19][20][21]. The luminescence characteristics of Eu 3+ doped ZnO have become more interesting because of their enormous potential for plasma displays, fiber lasers, bio-images, solar cells, and displays in terms of emission in general [22,23].…”

Section: Introductionmentioning

confidence: 99%

Bright red luminescence emission of macroporous honeycomb-like Eu3+ ion-doped ZnO nanoparticles developed by gel-combustion technique

Naik

Viswanath

et al. 2020

SN Appl. Sci.

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The impact of europium (Eu 3+) ion doping has been outlined in improving the structure and optical properties of macroporous honeycomb-like zinc oxide (ZnO) nanoparticles, produced by the gel-combustion technique by changing the quantity of dopant. The X-ray diffraction (XRD) research verified that the hexagonal wurtzite structure of ZnO was not disturbed by Eu 3+ substitution. Scherrer method, Scherrer plots (SP), Williamson-Hall (W-H) plots and Size-Strain plots (SSP) were used to estimate the crystallite size. Decreased crystallite size in ZnO:Eu 3+ was noticed along with lower angle shift of XRD peaks and increased lattice parameters such as unit cell volume that can be described as replacement result of Eu 3+ at Zn sites. Fourier transform infrared (FTIR) spectroscopy analysis confirmed the Eu 3+ dopant by moving the peak from 474 cm −1 to 525 cm −1. Field-emission scanning electron microscopy (FESEM) pictures verified macroporous honeycomb-like structures. UV-Visible (UV-Vis) absorption spectroscopic studies show that the ability of ZnO:Eu 3+ nanoparticles concerning the absorption of visible light increased upon Eu 3+ doping with a red shift compared to ZnO nanoparticles. Photoluminescence (PL) emission spectra of Eu 3+ doped ZnO nanoparticles exhibited five intense band emissions at 579, 591, 617, 652, and 706 nm ascribed to 5

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“…As is well known, many factors might have effects on the emission efficiency of RE 3+ . In this article, the effects of charge compensation should be excluded because that charge compensation was used to apply in a charge imbalanced system, such as CaSrAl 2 SiO 7 : Ce 3+ with the substitution of bivalent Sr 2+ by trivalent Ce 3+ [36], Ca 3 (PO 4 ) 2 : Tb 3+ with the substitution of bivalent Ca 2+ by trivalent Tb 3+ [17], and ZnO: Eu 3+ with the substitution of bivalent Zn 2+ by trivalent Eu 3+ [37]. Codoping monovalent alkali element such as Li + , Na + , and K + with the trivalent RE 3+ can realize charge compensation.…”

Section: Resultsmentioning

confidence: 99%

The Effects of Li+ Doping on Structure and Upconversion Luminescent Properties for Bi3.46Ho0.04Yb0.5Ti3O12: xLi Phosphors

et al. 2021

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A series of novel Li+ doped Bi3.46Ho0.04Yb0.5Ti3O12 (BHYTO: xLi, 0 ≤ x ≤ 0.15) upconversion phosphors were prepared through a sol-gel-sintering method. There exist three emission bands centered at 545 nm, 658 nm, and 756 nm in the upconversion emission spectra at 980 nm excitation, corresponding to energy transitions of 5F4/5S2 → 5I8, 5F5 → 5I8 and 5F4/5S2 → 5I7 of Ho3+, and the upconversion emission intensity of BHYTO: 0.05Li is about 2.2 times stronger than that of BHYTO samples. The luminescent lifetime of the strongest emission (545 nm) is in the range of 45.25 to 65.99 μs for the different BHYTO: xLi phosphors. The energy transfers during the upconversion pumping process from Yb3+ to Ho3+ are mainly responsible for all the emissions, each belonging to a double-photon process. Li+ mainly entered into the interspace sites or occupied Bi3+ sites in Bi4Ti3O12 host during the fabrication process according to its dosage, and the possibility is very low for Li+ to take part in the energy transfer process directly due to its lack of matching levels with 4f of Ho3+ and Yb3+. However, Li+ doping can not only increase the size of crystal grains to improve crystallinity through XRD analysis, but also reduced oxygen vacancies to decrease the number of quenching centers through XPS analysis. The improved crystallinity and reduced quenching centers are proposed to be the main causes for the enhanced upconversion luminescence of the Li+ doped BHYTO phosphor.

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Emission enhancement of Eu3+-doped ZnO by adding charge compensators

Cited by 69 publications

References 82 publications

Characterization of Eu doped ZnO micropods prepared by chemical bath deposition on p-Si substrate

Characterization of Eu doped ZnO micropods prepared by chemical bath deposition on p-Si substrate

Bright red luminescence emission of macroporous honeycomb-like Eu3+ ion-doped ZnO nanoparticles developed by gel-combustion technique

The Effects of Li+ Doping on Structure and Upconversion Luminescent Properties for Bi3.46Ho0.04Yb0.5Ti3O12: xLi Phosphors

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