LED ENCAPSULANT COMPRISNG A RARE EARTH METAL OXIDE PARTICLES

摘要

The present invention relates to an LED encapsulant comprising rare earth metal oxide particles. More particularly, the present invention includes 50 wt% or less of compound represented by chemical formula 1: M_a(OH)_b(CO_3)_cO_d in a polymer resin. A composition of the present invention dramatically improves light extraction efficiency created on an LED chip. In the chemical formula 1: M is Sc, Y, La, Al, Lu, Ga, Zn, V, Zr, Ca, Sr, Ba, Sn, Mn, Bi, or Ac; and a is 1 or 2, b is 0 to 2, c is 0 to 3, and d is 0 to 3. However, b, c, and d are not simultaneously 0, and b and c are simultaneously 0 or not 0.