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Molecular discharges as light sources

  • Nearly all discharge lamps in Lighting applications are based on atomic species. The use of mercury, sodium or rare gases is state of the art. In existing high intensity discharge (HID) lamps containing metal halides molecular radiation is contributing to a lesser extent to the spectrum. In some transient rare gas discharges (e.g. dielectric barrier discharges) the radiation originates from excimer molecules formed from the atomic fill gases within the plasma. The sulfur lamp was the first attractive concept solely based on a molecular filling. This HID operating in S-2 vapour stimulated the search for other molecular discharges, which are favourable for Lighting purposes. The presentation gives an overview over molecular discharges, which are of interest for Lighting applications. General demands on and basic properties of such discharges are described. The focus is put on light sources, which are able to generate white light with good colour rendering properties. Besides concepts for HID also opportunities for fluorescent lamp like discharges (molecular low pressure discharges, LPD) are discussed. The emphasis is placed on recent findings.

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Document Type:Conference Object
Parent Title (English):Zissis (Ed.): Light Sources 2004. Proceedings of the 10th International Symposium on the Science and Technology of Light Sources, Toulouse, France, Jul 18-22, 2004
First Page:75
Last Page:84
Publication year:2004
Departments, institutes and facilities:Fachbereich Elektrotechnik, Maschinenbau, Technikjournalismus
Dewey Decimal Classification (DDC):600 Technik, Medizin, angewandte Wissenschaften / 620 Ingenieurwissenschaften / 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Entry in this database:2015/04/02