| abstract |
Providing phosphors that have a broad emission spectrum in the blue range (peak wavelength: 400 nm to 500 nm), a wide and flat excitation band in the near ultraviolet / ultraviolet range, and excellent emission efficiency, emission intensity, and luminance To do. A phosphor represented by the general formula MmAaBbOoNn: Z (M element is one or more elements having a valence of II, and A element is one or more elements having a valence of III. , B element is one or more elements having an IV valence, O is oxygen, N is nitrogen, and Z is one or more activators), 5.0 <( a + b) / m <9.0, 0 ≦ a / m ≦ 2.0, 0 ≦ o <n, n = 2 / 3m + a + 4 / 3b−2 / 3o, excited by light in the wavelength range from 250 nm to 430 nm In this case, the phosphor is characterized in that the maximum peak wavelength in the emission spectrum is in the range of 400 nm to 500 nm. |