Degradation mechanisms of the blue-emitting phosphor BaMgAl10O17:Eu2+ under baking and VUV-irradiating treatments

Zhang, Shuxiu; Kono, Toshihiko; Itô, Akira; Yasaka, Taketo; Uchiike, Heiju

doi:10.1016/s0022-2313(03)00132-7

Cited by 83 publications

(72 citation statements)

References 14 publications

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“…[45][46][47][48] Moreover, at higher temperatures the oxidation of Eu 2+ to Eu 3+ on the surface is observed. [49,50] In the case of BAM, there are no indications for an analogous oxidation caused by radiation, but structural changes in the host lattice are likely. [50] This situation is suggested by the quickly decreasing stability of BAM under radiation with wavelengths below 175 nm, which is equal to the band gap of the host lattice.…”

Section: The Blue Color Pointmentioning

confidence: 99%

“…[49,50] In the case of BAM, there are no indications for an analogous oxidation caused by radiation, but structural changes in the host lattice are likely. [50] This situation is suggested by the quickly decreasing stability of BAM under radiation with wavelengths below 175 nm, which is equal to the band gap of the host lattice. [51] The resistance to radiation and the thermal stability is improved by coating the phosphor particles with AlPO 4 , Al 2 O 3 , or SiO 2 .…”

Section: The Blue Color Pointmentioning

confidence: 99%

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Recent Developments in the Field of Inorganic Phosphors

2009

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Because fossil fuels are becoming scarce and because of the expected climate change, our standard of living can only be maintained by a significant increase in energy efficiency. Large amounts of energy are consumed for lighting and during operation of displays. Thus, the targets are the development of economical light sources like white-light-emitting diodes and display panels with enhanced efficiency. Solar energy is converted into electricity by solar cells, and their efficiency must be improved considerably. A possible contribution might be delivered by phosphors which allow the conversion of thermal radiation into electrical energy. Although the target of energy efficiency is very important, we must not overlook that medical imaging diagnostic methods require efficient and sensitive detectors. For the solution of these central questions, inorganic solid-state materials doped with rare-earth ions are very promising and are therefore in the focus of current research activities.

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Section: The Blue Color Pointmentioning

confidence: 99%

Section: The Blue Color Pointmentioning

confidence: 99%

Recent Developments in the Field of Inorganic Phosphors

2009

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“…It possesses high quantum efficiency (around 80%), good chromaticity, and strong absorption in the vacuum ultraviolet excitation band, making it widely used in three-band fluorescence lamps, plasma display panels (PDPs), and white light-emitting diode (LED). [1][2][3][4] However, the oxidation resistance of BAM is rather poor. The BAM phosphor will undergo a decrease of luminescence intensity during post-treatment processes, for example, irradiation by ultraviolet photons, ion sputtering, and baking process in air during PDP manufacture.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Optical Performance of BaMgAl₁₀O₁₇:Eu²⁺ Phosphor by a Novel Method of Carbon Coating

et al. 2016

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Many strategies have been adopted to improve thermal degradation of phosphors. Because of the stability and high transmittance of graphene, here we report a novel method of carbon coating on BaMgAl 10 O 17 : Eu 2+ (BAM) phosphor particles through Chemical Vapor Deposition (CVD). The chemical composition, microstructure, and luminescence performance of carbon-coated BAM were characterized carefully. This coating can be controlled within 3-10 atomic layers, depending on the reaction time. Due to the decrease of surface defects and the effective weakening effect of oxidizing Eu 2+ to Eu 3+ after

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“…[45][46][47][48] Des Weiteren wird bei erhöhten Temperaturen die oberflächliche Oxidation von Eu 2+ nach Eu 3+ beobachtet. [49,50] Allerdings gibt es im Fall von BAM keine Hinweise auf eine analoge strahlungsinduzierte Oxidation, sondern eher auf Veränderungen im Wirtgitter. [50] Hierauf deutet die schlagartig abnehmende Stabilität bei Bestrahlung mit Wellenlängen unter etwa 175 nm hin, was der Bandlücke von BAM entspricht.…”

Section: Der Blaue Farbpunktunclassified

“…[49,50] Allerdings gibt es im Fall von BAM keine Hinweise auf eine analoge strahlungsinduzierte Oxidation, sondern eher auf Veränderungen im Wirtgitter. [50] Hierauf deutet die schlagartig abnehmende Stabilität bei Bestrahlung mit Wellenlängen unter etwa 175 nm hin, was der Bandlücke von BAM entspricht. [51] Strahlungs-und Temperaturbeständigkeit werden durch Beschichtungen der Leuchtstoffpartikel mit AlPO 4 , Al 2 O 3 oder SiO 2 verbessert.…”

Section: Der Blaue Farbpunktunclassified

Aktuelle Entwicklungen auf dem Gebiet der anorganischen Leuchtstoffe

Höppe

2009

Angewandte Chemie

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Energiesparen ist angesagt! Eine Steigerung der Energieffizienz ermöglichen neue anorganische lumineszierende Materialien, wie sie in Displays und weißen Leuchtdioden (Bild: Farbdiagramm; Mischung der drei Emissionen A–C liefert beliebige Farbtöne innerhalb des Dreiecks) zum Einsatz kommen. In Hg‐freien Leuchtstoffröhren könnten sie einen Beitrag zum Umweltschutz leisten; außerdem liefern sie bessere Szintillatoren für die medizinische Diagnose.magnified imageAngesichts knapp werdender Rohstoffe und des zu erwartenden Klimawandels lässt sich unser Lebensstandard nur durch eine signifikante Steigerung der Energieeffizienz erhalten. Sehr viel Energie wird zur Beleuchtung oder beim Betrieb von Bildschirmen aufgewendet. Herausforderungen sind somit die Entwicklung sparsamer Leuchtmittel, wie weiße Leuchtdioden, und möglichst effizienter Bildschirmkonzepte. Die Nutzung der Sonnenenergie gelingt über Solarzellen, deren Effizienz sich deutlich verbessern muss. Einen Beitrag hierzu könnten spezielle Leuchtstoffe leisten, die zusätzlich die Stromerzeugung aus Wärmestrahlung ermöglichen. Eine weitere wichtige Anwendungsmöglichkeit findet sich bei bildgebenden medizinischen Untersuchungsverfahren, die effiziente und empfindliche Detektoren erfordern, um Patienten zu schonen. Bei der Lösung dieser zentralen Fragen stehen vielversprechende Seltenerdionen‐dotierte anorganische Festkörperverbindungen im Zentrum der Forschungsaktivitäten.

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Degradation mechanisms of the blue-emitting phosphor BaMgAl10O17:Eu2+ under baking and VUV-irradiating treatments

Cited by 83 publications

References 14 publications

Recent Developments in the Field of Inorganic Phosphors

Recent Developments in the Field of Inorganic Phosphors

Enhanced Optical Performance of BaMgAl₁₀O₁₇:Eu²⁺ Phosphor by a Novel Method of Carbon Coating

Aktuelle Entwicklungen auf dem Gebiet der anorganischen Leuchtstoffe

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Degradation mechanisms of the blue-emitting phosphor BaMgAl10O17:Eu2+ under baking and VUV-irradiating treatments

Cited by 83 publications

References 14 publications

Recent Developments in the Field of Inorganic Phosphors

Recent Developments in the Field of Inorganic Phosphors

Enhanced Optical Performance of BaMgAl10O17:Eu2+ Phosphor by a Novel Method of Carbon Coating

Aktuelle Entwicklungen auf dem Gebiet der anorganischen Leuchtstoffe

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Enhanced Optical Performance of BaMgAl₁₀O₁₇:Eu²⁺ Phosphor by a Novel Method of Carbon Coating