White light emission from Eu3+ in CaIn2O4 host lattices

Liu, Xiaoming; Lin, Cuikun; Lin, Jun

doi:10.1063/1.2539632

Cited by 182 publications

(137 citation statements)

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“…If the max is higher, the higher-level emission can be quenched by multiphonon emission; if the max is low enough, all these higher-level emissions can be observed. 16,17 The max of LaInO 3 is determined to be 554 cm −1 ͑shown in IR spectrum, Fig. 3͒ phosphors, the obtained phosphors give orange-red luminescence ͑Fig.…”

Section: P2mentioning

confidence: 96%

Tunable Photoluminescence and Cathodoluminescence Properties of Eu[sup 3+]-Doped LaInO[sub 3] Nanocrystalline Phosphors

Liu

Lin

2009

J. Electrochem. Soc.

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LaInO 3 :Eu 3+ phosphors were prepared by a Pechini sol-gel process. X-ray diffraction ͑XRD͒, field-emission scanning electron microscopy ͑FE-SEM͒, diffuse reflectance, photoluminescence, cathodoluminescence spectra, as well as lifetimes were utilized to characterize the synthesized phosphors. XRD results reveal that the sample begins to crystallize at 600°C and pure LaInO 3 phase can be obtained at 800°C. The crystallinity increases upon raising the annealing temperature. The FE Field-emission display ͑FED͒ is a developing technology which has the potential to provide displays with a high brightness, high contrast ratio, light weight, and low power consumption.1-4 Phosphors used in FEDs require several properties that the traditional cathode ray tube ͑CRT͒ phosphors may not possess, such as high electric conductivity, low surface recombination velocities, vacuum compatibility ͑low outgassing͒, hazardlessness to cathodes, and the ability to withstand high current densities. 5 The most popular sulfide-based phosphors for CRTs are no longer suitable for FEDs because of low conductivity and fast degradation at high current densities.6-8 Semiconducting oxide-based phosphors have been found to be the optimal candidate, as they are sufficiently conductive to overcome the charge buildup on the phosphor surfaces, in addition to their thermal and chemical stability. 9-11Semiconducting compound LaInO 3 with a bandgap of 3.2 eV belongs to the orthorhombically distorted perovskite-like structure with space group Pnma.12 The structure consists of a threedimensional sublattice of corner-connected InO6 octahedra, and the La 3+ is in eightfold coordination of oxide ions, which have the potential to serve as a host material in phosphor applications. All the octahedra are sharing their corners and are slightly tilted. As opposed to a cubic perovskite, in LaInO 3 there are two crystallographic oxygen atoms, two ͑O1͒ on opposite corners of an octahedron along the b axis and four ͑O2͒ on the same a-c plane on an octahedron. 13 Aside from its luminescence potential, recent interest in LaInO 3 lanthanum orthoindate bulk crystals is driven by possible applications of this material as an electrolyte for solid fuel cells.14 Rare-earth ions have been playing an important role in modern lighting and display fields due to the abundant emission colors based on their 4f-4f or 5d-4f transitions. 1,7,10 The trivalent europium ion ͑Eu 3+ ͒ is well known as a red-emitting activator due to its 5 D 0 -7 F J ͑J = 0,1,2,3,4, usually ranging from 578 for J = 0 to 700 nm for were mixed together under stirring. Then, citric acid and polyethylene glycol ͑PEG, molecular weight = 10,000͒ were dissolved in the above solution ͑C PEG = 0.01 M, citric acid/metal ion = 2:1͒. The resultant mixtures were stirred for 1 h and condensed at 75°C in a water bath until homogeneous gels formed. After being dried in an oven at 110°C for 10 h, the gels were ground and prefired at 450°C for 4 h in air. Then, the samples were fully ground and fired to the desired temperatur...

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Section: P2mentioning

confidence: 96%

Tunable Photoluminescence and Cathodoluminescence Properties of Eu[sup 3+]-Doped LaInO[sub 3] Nanocrystalline Phosphors

Liu

Lin

2009

J. Electrochem. Soc.

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“…These four excellent optical-function oxides with d 10 electron configuration are probably applied in water splitting and the photoluminescent field [9,10,[18][19][20]. Subsequently, structures and morphologies of these oxides were confirmed by X-ray powder diffraction, scanning electron microscopy, Raman spectroscopy and infrared spectroscopy, respectively.…”

Section: Introductionmentioning

confidence: 94%

Vibrational spectra of CaGa2O4, Ca2GeO4, CaIn2O4 and CaSnO3 prepared by electrospinning

et al. 2012

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CaGa 2 O 4 nanofibers, Ca 2 GeO 4 microfibers, CaIn 2 O 4 nanorods, and CaSnO 3 nanofibers were synthesized by using an electrospinning technique. Structures and morphologies of the as-synthesized oxides were characterized by X-ray diffraction and scanning electron microscopy, respectively. Raman and infrared spectra were also recorded and analyzed at room temperature. More significantly, nuclear site group analysis was carried out and the number of normal vibrational modes, Raman-active, and infraredactive optical phonon modes were obtained by theoretical calculation. Finally, vibrational assignments of the observed Raman peaks and infrared absorption bands were given based on the group theoretical analysis and experimental data from literature.

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“…The commonly alternative way is to employ an ultraviolet (UV) LED chip as the excitation light source with different color phosphors [8,9]. Furthermore, a kind of single-phased white-emitting phosphor has triggered active research efforts recently, which includes an appropriate host lattice with singly doping Eu 3+ ion [10][11][12]. All their principles can be summarized to the abundant Eu 3+ emissions which yield the blue and green emissions from the higher 5 D J levels ( 5 D 1 , 5 D 2 , and 5 D 3 ) and the red emission * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%