METHOD OF MANUFACTURING LIGHT EMITTING DEVICE

摘要

There is provided a method of manufacturing a light emitting device which includes preparing a light emitting element emitting excitation light and a substrate on which the light emitting element is disposed. A fluoride phosphor is provided to absorb excitation light emitted from the light emitting element to emit visible light, and is represented by Chemical Formula (1). The fluoride phosphor is disposed on at least one of the light emitting element and the substrate, wherein Chemical Formula (1): AxMFy:Mn4+ (wherein 2≦x≦3 and 4≦y≦7, A is at least one element selected from the group consisting of Li, Na, K, Rb, and Cs, and M is at least one element selected from the group consisting Si, Ti, Zr, Hf, Ge, and Sn).

主权项

1. A method of manufacturing a light emitting device, the method comprising:
preparing a light emitting element emitting excitation light and a substrate having a first surface on which the light emitting element is disposed; mounting the light emitting element on the first surface of the substrate; preparing a fluoride phosphor absorbing excitation light emitted from the light emitting element to emit visible light, represented by Chemical Formula (1):
AxMFy:Mn4+  Chemical Formula (1)wherein 2≦x≦3 and 4≦y≦7, A is at least one element selected from the group consisting of Li, Na, K, Rb, and Cs, and M is at least one element selected from the group consisting Si, Ti, Zr, Hf, Ge, and Sn; and
disposing the fluoride phosphor on at least one of the light emitting element and the substrate, wherein the preparing of the fluoride phosphor represented by the Chemical Formula (1) comprises:
preparing a first aqueous solution including at least one of K2MnF6 and Na2MnF6, the first aqueous solution being a first hydrofluoric acid aqueous solution having at least one of KMnF6 and NaMnF6 dissolved therein;forming a first precipitate using the first aqueous solution, a first raw material containing M and a second raw material containing A, by stirring the first raw material in the first hydrofluoric acid aqueous solution and by adding the second raw material to the product generated by the stirring operation to form the first precipitate;washing the first precipitate with at least a 40 wt % hydrofluoric acid aqueous solution; anddrying the washed first precipitate.