Influence of Polymer Decomposition Temperature on the Formation of Rare-Earth Free Boron Carbon Oxynitride Phosphors

Ogi, Takashi; Iskandar, Ferry; Nandiyanto, Asep Bayu Dani; Wang, Weining; Okuyama, Kikuo

doi:10.1252/jcej.12we138

Cited by 23 publications

(15 citation statements)

References 16 publications

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“…According to the TGA results of Sun and et al, the thermal degradation of LPEI in the presence of metal oxide (TiO 2 and MnO 2 ) has extended the temperature range compared with LPEI without (lone LPEI) . Ogi et al reported exothermic decomposition of PEI ( M w = 1800) in 350°C at heating rate of 10°C min −1 in air . The TGA curve revealed partial weigh loss (less than 1%) due to decomposition of PEI ( M w = 25 000).…”

Section: Resultsmentioning

confidence: 99%

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Effect of polyethylenimine addition and washing on stability and electrophoretic deposition of Co₃O₄ nanoparticles

et al. 2017

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In this work, the parameters of cobalt oxide suspension such as conductivity, zeta potential, particle size, stability, and finally the electrophoretic behavior of particles in the absence and presence of polyethylenimine (PEI) in acetone medium were investigated. Also, the effects of washing on the stability and electrophoretic deposition of Co3O4 were studied. Characterization of the obtained layer by optical microscopy revealed that there was no deposition in the suspension without PEI, while a uniform layer was formed in the presence of PEI additive. Scanning electron microscopy (SEM) results confirmed the uniformity of layer obtained in acetone using PEI additive. Moreover, SEM results demonstrated that more porous microstructures were obtained at longer deposition durations. The difference in the porosity of the layers, as indicated by the SEM micrographs, is attributed to increase in the deposition time.

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Section: Resultsmentioning

confidence: 99%

“…24 | 559 air. 35 The TGA curve revealed partial weigh loss (less than 1%) due to decomposition of PEI (M w = 25 000).…”

Section: Effect Of Timementioning

confidence: 97%

Effect of polyethylenimine addition and washing on stability and electrophoretic deposition of Co₃O₄ nanoparticles

et al. 2017

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“…Thus this paper deserves the Outstanding Paper Award. (Ogi et al, 2012) Citation: This paper investigates the influence of polymer used for the preparation on the properties of boron carbon oxynitride (BCNO) phophors, which have been previously developed by the authors' research group. They found that polyethyleneimine gave the phosphor particles which showed highest internal quantum efficiency and this is achieved because of its optimum decomposition temperature and high exothermic energy during the BCNO formation.…”

Section: "Repeated Cooling Crystallization For Production Of Microcrymentioning

confidence: 99%

JCEJ Outstanding Paper Award of 2012

Shishido

Honda

2013

J. Chem. Eng. Japan

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Citation: This paper investigated the characteristics of the fluid flow of viscoelastic surfactant solutions in a mixing vessel by flow visualization. In the vicinity of the impeller an actively mixed onion-like structure was found. In addition, it appeared that the impeller region was covered by a network-deformed fluid and an onion-like structure was formed if the elastic force was not much smaller than the inertia force and that the onion-like structure was stable under the condition that the lowest impeller rotation speed. These results included significant new knowledge in the mixing of viscoelastic surfactant solutions. Therefore, this paper was selected as an outstanding paper. "Marangoni Flows in Polymer SolutionDroplets Drying on Heating Surfaces" by Shohei Yasumatsu, Kouichi Nakaso, and Jun Fukai, Kyushu University (Yasumatsu et al., 2012) Citation: This paper experimentally and numerically examines transport phenomena in an evaporating, polymer solution droplet on a heated substrate. The relative influence of each Marangoni force, thermal or solutal, on the internal droplet flow is investigated in this article. The authors demonstrate that both thermal and solutal Marangoni forces are important determining factors for the flow within an evaporating droplet. The authors' numerical method enables one to explore the distribution of momentum, solute concentration, and temperature within a droplet. The study of transport phenomena within evaporating droplets is a difficult and practical problem and the results of this study contribute to further development in the field. Therefore this paper merits the Outstanding Paper Award.3. "Numerical Simulations of a Bubble Rising through a Shear-thickening Fluid" by Mitsuhiro Ohta, Sachika Kimura, Tomohiro Furukawa, Yutaka Yoshida, and Mark Sussman, Muroran Institute of Technology and Florida State University (Ohta et al., 2012) Citation: This paper presents three-dimensional computational results for single bubbles rising through shear-thickening fluids. The simulations are carried out according to a coupled level-set/volume-of-fluid (CLSVOF) method. The authors computationally show that the bubble rise velocity decreases and shape deformation of the bubble is restrained by way of the increase in viscosity resulting from the shear thickening effect. The validity of effective viscosity and effective physical dimensionless numbers are examined for bubble rise motion in the shear-thickening fluids, in addition to

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“…16 Thus, the development of alternative phosphors such as rare-earth-free phosphors [17][18][19][20] to preserve natural resources is highly important. For example, the availability of rare earth materials is being affected by rising their prices and limiting the export products imposed by rare earth producing countries.…”

Section: Introductionmentioning

confidence: 99%

Development of rare-earth-free phosphors for eco-energy lighting based LEDs

et al. 2015

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International audienceSeveral phosphors without rare-earth elements were synthesized by a simple and practical method. Depending on their wavelength emitting range upon UV excitation, i.e. blue, green or red, they were classified in three groups. The phosphors exhibiting the best performances in optical properties were selected to be incorporated in free-standing silicon films and combined with a 365 nm LED. The thermal quenching of phosphors as well as the photometric parameters of the luminescent composite films were investigated. This white emission of the combination between the rare-earth-free phosphors based silicon film and LED shows a CRI >75 and CCT around 4000 K which can fulfil the requirements for indoor domestic lighting source

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Influence of Polymer Decomposition Temperature on the Formation of Rare-Earth Free Boron Carbon Oxynitride Phosphors

Cited by 23 publications

References 16 publications

Effect of polyethylenimine addition and washing on stability and electrophoretic deposition of Co₃O₄ nanoparticles

Effect of polyethylenimine addition and washing on stability and electrophoretic deposition of Co₃O₄ nanoparticles

JCEJ Outstanding Paper Award of 2012

Development of rare-earth-free phosphors for eco-energy lighting based LEDs

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Influence of Polymer Decomposition Temperature on the Formation of Rare-Earth Free Boron Carbon Oxynitride Phosphors

Cited by 23 publications

References 16 publications

Effect of polyethylenimine addition and washing on stability and electrophoretic deposition of Co3O4 nanoparticles

Effect of polyethylenimine addition and washing on stability and electrophoretic deposition of Co3O4 nanoparticles

JCEJ Outstanding Paper Award of 2012

Development of rare-earth-free phosphors for eco-energy lighting based LEDs

Contact Info

Product

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Effect of polyethylenimine addition and washing on stability and electrophoretic deposition of Co₃O₄ nanoparticles

Effect of polyethylenimine addition and washing on stability and electrophoretic deposition of Co₃O₄ nanoparticles