Light emitting device and light emitting device package including the same

A light emitting device package comprising a light emitting device, wherein the light emitting device includes:

• a support member;
• a light emitting structure including a first semiconductor layer disposed on the support member, a second semiconductor layer and an active layer between the first semiconductor layer and the second semiconductor layer;
• a first electrode disposed on the first semiconductor layer in a first region through which the first semiconductor layer is exposed;
• a second electrode disposed on the second semiconductor layer;
• an insulating layer disposed at least between the first electrode and the second electrode;
• a light transmittable electrode layer disposed between the second semiconductor layer and the second electrode;
• and
• a reflective layer between the light transmittable electrode layer and the second electrode, and the light emitting structure,
• wherein the first semiconductor layer is a different layer than the second semiconductor layer, the active layer includes at least one pair of a well layer and a barrier layer, and a band gap of the well layer is less than a band gap of the barrier layer, and
• wherein an area of an upper surface of the first electrode is in a range of 40% to 90% of an area of the second semiconductor layer,
• wherein the reflective layer is formed from an upper surface of the second semiconductor layer to an upper surface of the first semiconductor layer along a lateral surface of the second semiconductor layer and a lateral surface of the active layer,
• wherein the reflective layer includes at least a first layer having a first index of refraction and a second layer having a second index of refraction that is different from the first index of refraction,
• wherein the first layer and the second layer of the reflective layer are alternately and repeatedly stacked one above another,
• wherein the first layer comprises SiO2 or Al2O3,
• wherein the second layer comprises TiO2, and
• wherein the second electrode is connected to the light transmittable electrode layer through an opening of the reflective layer.