Light-emitting device and manufacturing method thereof

Abstract

A light-emitting device including a substrate; a first conductivity semiconductor layer on the substrate; a first barrier on the first conductivity semiconductor layer; a well on the first barrier and including a first region having a first energy gap and a second region having a second energy gap and closer to the semiconductor layer than the first region; a second barrier on the well; and a second conductivity semiconductor layer on the second barrier; wherein the first energy gap decreases along a stacking direction of the light-emitting device and has a first gradient, the second energy gap increases along the stacking direction and has a second gradient, and an absolute value of the first gradient is smaller than an absolute value of the second gradient.

Dependencies are inferred from the claim text.