New rare earth metal meta:borate-based silicate-borate phosphor

摘要

A novel silicate-borate phosphor is based on rare earth metal metaborates of formula (I). (Y, La)1xy-zCexGdyTbz(Mg, Zn, Cd)1pMnpB5q-s(Al, Ga)qXsO10 (I), where X = Si, Ge, P, Zr, V, Nb, Ta and/or W and (i) y = z = p = 0, x = 0.01 to 1.0, q = 0 to 1.0 and s = greater than 0 to 1.0; (ii) z = p = 0, x = 0.01 to 1-y, y = 0.02 to 0.80, q = 0 to 1.0 and s = greater than 0 to 1.0; (iii) p = 0, x = 0.01 to 1-y-z, y = 0 to 0.98, y+z = = 0.99, z = 0.01 to 0.75, q = 0 to 1.0 and s = greater than 0 to 1.0; (iv) z = 0, x = 0.01 to 1-y, y = 0 to 0.99, p = 0.01 to 0.30, q = 0 to 1.0 and s = greater than 0 to 1.0; or (v) x = 0.01 to 1-y-z, y = 0 to 0.98, z = 0.01 to 0.75, x+z = = 0.99, p = 0.01 to 0.30, q = 0 to 1.0 and s = greater than 0 to 1.0.