| abstract |
Provided is a phosphor having a broad peak in the emission spectrum in the range of green to yellow, and having a wide and flat excitation zone that can use a wide range of blue light as excitation light in near ultraviolet and ultraviolet rays, and has excellent luminous efficiency and luminance.n n n Is a phosphor represented by the general formula MmAaBbOoNn: Z (element M is at least one element having a II value, element A is at least one element having a III value, element B is at least one element having a IV value, and O is oxygen And N is nitrogen, and Z is at least one type of activator.), 4.0 <(a + b) / m <7.0, a / m≥0.5, b / a> 2.5, n> o, n = 2 / 3m + a + 4 / The above problems were solved by inventing a phosphor having a peak wavelength in the emission spectrum of 500 nm to 650 nm when 3b-2 / 3o and excited with light in the wavelength range of 300 nm to 500 nm.n n n Phosphor, phosphor mixture, emission spectrum, peak wavelength, activator |