Low-pressure inductive rf discharge in a rare gas-halogen mixture for economical mercury-free luminescence light sources

Golovitskii, A. P.

doi:10.1134/1.1262066

Cited by 9 publications

(4 citation statements)

References 4 publications

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“…Besides white-light-emitting diodes (Section 2), noblegas-filled luminescent tubes might be an alternative. In contrast to other plasma light sources such as barium, [94,95] Mo/Ar, [96] or noble gases with added chlorine, such as Xe/ Cl 2 , [97] the noble gas plasma hardly reacts with the tube wall and the electrodes. [98] The emissions in Xe vapor lamps are found around 147 (base line) and 172 nm (excimer band).…”

Section: Gas Discharge Lampsmentioning

confidence: 98%

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: Gas Discharge Lampsmentioning

confidence: 98%

Recent Developments in the Field of Inorganic Phosphors

2009

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“…Diese Eigenschaften führen zu vergleichsweise hohen Quantenausbeuten. [16,92] So hergestellte dotierte Nanopartikel La-PO 4 [94,95] Mo/Ar [96] oder Edelgasen mit Chlorbeimengungen wie Xe/Cl 2 [97] reagiert das Edelgasplasma kaum mit der Röhrenwand und dem Elektrodenmaterial. [98] Abbildung 4.…”

Section: Szintillationsmaterialienunclassified

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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“…Recently, radio frequency ͑rf͒ inductive discharges operating at low pressures ͑1-5 Torr͒ were suggested as a feasible source for lighting. [2][3][4] In addition, because the use of mercury causes disposal and environmental problems, rare gas mixture or rare gashalogen mixtures are candidates for replacement of mercury. However, with these candidates, the luminous efficiency is currently lower than that of mercury fluorescent lamps; thus more study to improve luminous efficiency is warranted.…”

Section: Introductionmentioning

confidence: 99%

Radiation transport coupled particle-in-cell simulation of low-pressure inductive discharges

Lee

Verboncoeur

2002

Physics of Plasmas

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Low pressure (1–5 Torr) argon discharges driven by an inductive radio frequency wave are simulated with a one-dimensional radiation transport coupled particle-in-cell model. The discharge is maintained by an induced azimuthal electric field which is self-consistently coupled with plasma dynamics. The radiation efficiency is investigated for the variations of input power, gas pressure, and cylinder radius, and compared with that of positive column discharges. The radiation efficiency is improved up to 8% compared with that of conventional positive column discharges by virtue of reduced radiation trapping resulting from enhancement of excitation collisions near the wall for inductive discharges.

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Low-pressure inductive rf discharge in a rare gas-halogen mixture for economical mercury-free luminescence light sources

Cited by 9 publications

References 4 publications

Recent Developments in the Field of Inorganic Phosphors

Recent Developments in the Field of Inorganic Phosphors

Aktuelle Entwicklungen auf dem Gebiet der anorganischen Leuchtstoffe

Radiation transport coupled particle-in-cell simulation of low-pressure inductive discharges

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