Phosphor for light-emitting element excited by vacuum ultra-violet ray

摘要

The objective of the present invention is to provide a phosphor for use in a light emitting element excited by vacuum ultraviolet-ray that has high brightness even after plasma exposure. This object is achieved by a phosphor comprising a compound represented by a formula M<1>1-aM<2>11-bMna+bO18-(a+b)/2 (wherein, M<1> represents at least one of materials selected from the group consisting of La, Y and Gd, and M<2> represents at least one of materials selected from the group consisting of Al and Ga, a represents a number in a range from not less than 0 to less than 1, b represents a number in a range from not less than 0 to less than 1, and sum of a and b is greater than 0), and by a light emitting element excited by vacuum ultraviolet-ray comprising the above-mentioned phosphor.