| abstract |
The present invention provides a white LED light emitting device with high color rendering efficiency and wide color gamut efficiency, and a method for producing a red light emitting phosphor capable of producing the white LED light emitting device. A method for producing a red-emitting phosphor according to an embodiment includes the following general formula (1): (M 1-x EC x ) a M 1 b AlO c N d (1) Is a method for producing a phosphor having Where M is Sr, EC is Eu, element M 1 is Si, 0 <x <0.2, 0.55 <a <0.80, 2.10 <b <3.90, 0 <c ≦ 0.25 and 4 <d <5, and this phosphor emits light having a peak between wavelengths 620 to 670 nm when excited with light having a wavelength of 250 to 500 nm. This phosphor includes a step of firing a mixture of a compound containing M, a compound containing EC, a compound containing M1, and a compound containing Al at a temperature of 1500 to 2000 ° C. under a pressure of atmospheric pressure or higher. It is characterized by performing. [Selection figure] None |