Red phosphor, method for producing red phosphor, white light source, illuminating device, and liquid crystal display device

摘要

A compound is provided containing silicon, aluminum, strontium, europium, nitrogen, and oxygen is used that enables a red phosphor having strong luminous intensity and high luminance to be obtained, and that enables the color gamut of a white LED to be increased with the use of the red phosphor. The red phosphor contains an element A, curopium, silicon, aluminum, oxygen, and nitrogen at the atom number ratio of the following formula: [A(m-x)Eux]Si9AlyOnN[12+y-2(n-m)/3]. The element A in the formula is at least one of magnesium, calcium, strontium, and barium, and m, x, y, and n in the formula satisfy the relations 3

主权项

1. A red phosphor comprising:
an element A, europium (Eu), silicon (Si), aluminum (Al), oxygen (O), and nitrogen (N) at the atom number ratio of the composition formula (1)
[A(m-x)Eux]Si9AlyOnN[12+y-2(n-m)/3]  Composition Formula (1); and Carbon, wherein the element A in the composition formula (1) is at least one of magnesium (Mg), calcium (Ca), strontium (Sr), and barium (Ba), and m, x, y, and n in the composition formula (1) satisfy the relations 4.5