| abstract |
In particular, the light-emitting device is located between the light output, a light source that generates light including a wavelength of 530 nm or less, and the light source and the light output, where x is 0.0001 to 1, y Is a value that defines Eu 2+ sufficient to provide luminescent emission, and z is 0.001-0.2 based on the molar amount of Sr x Ca 1-x Ga 2 S 4 Sr 1-x Light emission comprising a wavelength converter comprising Ca 2 S 4 : yEu 2 + · zGa 2 S 3 and a wavelength converter effective to increase light at a light output having a wavelength between 535 nm and 560 nm A device is provided. |