Abstract: A light emitting device includes a substrate on which a conductive pattern is disposed; a light emitting part including at least one light emitting chip; a light transmitting member disposed on the upper surface of the light emitting part; and a barrier member. The light transmitting member includes a pair of first side surfaces and a different pair of second side surfaces that face each other, and with respect to the lower surface, the first side surfaces may be formed at a first angle and the second side surfaces may be formed at a second angle, and the first angle may be smaller than the second angle.

Abstract: A compound of the general formula (I): A3BF2M1?xTxO2?2xF4+2x doped with Mn(IV), in which A is selected from the group consisting of Li, Na, K, Rb, Cs, Cu, Ag, Tl, NH4, NR4 and mixtures of two or more thereof, where R is an alkyl or aryl group, B is selected from the group consisting of H and D and mixtures thereof, where D is Deuterium, M is selected from the group consisting of Cr, Mo, W, Te, Re and mixtures of two or more thereof, T is selected from the group consisting of Si, Ge, Sn, Ti, Pb, Ce, Zr, Hf and mixtures of two or more thereof, and 0?x?1.