Patent ID: 6563850
Filing Date: 2003-05-13
Classification: B82Y,H01L,H01S

Abstract:
A light-emitting device, comprising:a first doped guide layer including Al; a second doped guide layer including Al; and an active layer interposed between the first doped guide layer and the second doped guide layer, the active layer having a multiple quantum well structure including a plurality of quantum well layers and a quantum barrier layer interposed between the adjacent quantum well layers, wherein the quantum barrier layer includes Al, wherein the first doped guide layer and the second doped guide layer are disposed to be adjacent to the quantum well layers, the first doped guide layer and the second doped guide layer have a forbidden band width which is larger than a forbidden band width of the quantum well layers, the forbidden band width of at least one of the first guide layer and the second guide layer is smaller than a forbidden band width of the quantum barrier layer, and the Al composition ratio of the first and second guide layers is smaller than the Al composition ratio of the quantum barrier layer.