| 摘要 |
<p>The present invention provides in one embodiment a light emitting device (1) that has a high efficacy even in a range of low color temperatures, a long-term reliability, and an improved color rendering property. In addition, the present invention provides in another embodiment a lighting apparatus (9) using such a light emitting device (1). In the light emitting device (1), a mixture of a first phosphorous material that emits yellow green, yellow or yellow orange light and a second phosphorous material that emits light having a longer wavelength than the first phosphorous material, for example, yellow orange or orange light is used as a phosphor. The first phosphorous material is represented by a general formula Ca x (Si, Al) 12 (O, N) 16 :Eu y 2+ and a main phase thereof has an alpha-SiAlON crystal structure.</p> |
