Novel materials used for emitting light

A luminescent composition emitting electromagnetic radiation when subject to appropriate electronic and/or electromagnetic stimuli, being of solid state materials based on anionic matrices, distinguished in that said matrices are altered by doping with anionic salts of rare earth metals and/or alkaline metals where the choice of anion(s) in such materials, hereafter termed ‘dopants’, is deliberately different from the anion(s) in the anionic host matrix, said doping arising from deliberate incorporation of the above dopants, as is shown by the final composition, and not accidental or impurity incorporation arising from the use of a flux during preparation.

A light emitting device providing emission of electromagnetic radiation from at least one of the materials of luminescent compositions emitting electromagnetic radiation when subject to appropriate electronic and/or electromagnetic stimuli, being solid state materials based on anionic matrices, distinguished in that these matrices are altered by doping with anionic salts of rare earth metals and/or alkaline metals where the choice of anion(s) in such materials, hereafter termed ‘dopants’ is deliberately different from the anion(s) in the anionic host matrix, this doping arising from deliberate incorporation of the above dopants, as is shown by the final stated composition, and not accidental or impurity incorporation arising from the use of a flux during preparation.

A material for a luminescent composition emitting electromagnetic radiation when subject to appropriate electronic and/or electromagnetic stimuli, being solid state materials based on anionic matrices, distinguished in that these matrices are altered by doping with anionic salts of rare earth metals and/or alkaline metals where the choice of anion(s) in such materials, hereafter termed ‘dopants’ is deliberately different from the anion(s) in the anionic host matrix, this doping arising from deliberate incorporation of the above dopants, as is shown by the final stated composition, and not accidental or impurity incorporation arising e.g., from the use of a flux during preparation, wherein the material comprising SrAl2O4, doped with one or more rare earth elements preferably in the form of fluorides, optionally for use as a bright white emitter.

A material for a luminescent composition emitting electromagnetic radiation when subject to appropriate electronic and/or electromagnetic stimuli, being solid state materials based on anionic matrices, distinguished in that these matrices are altered by doping with anionic salts of rare earth metals and/or alkaline metals where the choice of anion(s) in such materials, hereafter termed ‘dopants’ is deliberately different from the anion(s) in the anionic host matrix, this doping arising from deliberate incorporation of the above dopants, as is shown by the final stated composition, and not accidental or impurity incorporation arising e.g., from the use of a flux during preparation, wherein the material comprising CaAl12O19, optionally doped with one or more transition metals, preferably Mn and/or Fe, optionally in the form of oxides and/or halides and/or doped with one or more rare earth elements optionally in the form of fluorides.