Novel materials used for emitting light

Abstract

An luminescent composition comprises a mixture of two or more materials, emitting electromagnetic radiation when subject to stimuli, wherein the spectral emission is not calculable at a first approximation as the simple weighted sum of the spectral emissions of the materials independently subject to said stimuli. Especially advantageous compositions are achieved if the anionic matrix is an oxide and the doping anionic salt is a fluoride or vice versa.

Description

technical field [0001] The present invention relates to materials that emit electromagnetic radiation, especially visible light, when an excitation is provided. Background technique [0002] Certain materials, including natural minerals, are known to emit electromagnetic radiation, especially visible light (electromagnetic radiation in the human visible part of the spectrum, with wavelengths around 400nm to 700nm), when provided with appropriate excitation. The excitation can be electromagnetic radiation of a different nature, usually of a lower wavelength (higher frequency), where the phenomenon is known as fluorescence or phosphorescence, and the excitation radiation can be, for example, ultraviolet light: the excitation can also be, for example, high-energy Electrons or ions, the former involving direct (circuit) or indirect (electron bombardment) electrical contact. Other incentives are also possible. [0003] For the purpose of emitting light, especially of interior o...

AI Technical Summary

Problems solved by technology

One problem with making this transition is that known and existing phosphors are mostly developed for use with mercury vapor and perform poorly in other systems

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