PHOSPHOR AND LIGHT-EMITTING DEVICE

摘要

A high-brightness phosphor having high-temperature characteristics and long-term reliability, and a white light-emitting device using this phosphor are provided. The phosphor contains a silicate phosphor (A) having a peak wavelength of at least 525 nm but not higher than 535 nm and fluorescence intensity of at least 250% but not higher than 270%; an oxynitride phosphor (B) having a peak wavelength of at least 540 nm but not higher than 545 nm and fluorescence intensity of at least 260% but not higher than 280%; and an nitride phosphor (C) having a peak wavelength of at least 615 nm but not higher than 625 nm, wherein the amount of the silicate phosphor (A) is at least 20% but not higher than 35% by mass, the amount of the oxynitride phosphor (B) is at least 50% but not higher than 70% by mass, and the amount of the nitride phosphor (C) is at least 10% but not higher than 20% by mass.

主权项

1. A phosphor, comprising: a silicate phosphor (A) having a peak wavelength at least 525 nm but not higher than 535 nm and fluorescence intensity at least 250% but not higher than 270%;
an oxynitride phosphor (B) having a peak wavelength at least 540 nm but not higher than 545 nm and fluorescence intensity at least 260% but not higher than 280%; and an nitride phosphor (C) having a peak wavelength at least 615 nm but not higher than 625 nm, wherein, the amount of the silicate phosphor (A) is at least 20% but not higher than 35% by mass; the amount of the oxynitride phosphor (B) is at least 50% but not higher than 70% by mass; and the amount of the nitride phosphor (C) is at least 10% but not higher than 20% by mass.