Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing an optical semiconductor device capable of improving quantum efficiency. SOLUTION: An indium content of at least one well layer is increased in a step of growing the well layer. In the optical semiconductor device, the well layer has a first composition based on a nitride semiconductor material with first electron energy, and a barrier layer has a second composition based on the nitride semiconductor material with second electron energy higher than the first electron energy. A beam activated quantum well layer is grown on the barrier layer. Non-radiative well layers and the barrier layers form a superlattice for the beam activated quantum well layer. The layer thickness of the beam activated quantum well layer is larger than the layer thickness of the well layer of the superlattice. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
The device comprises alternate well layers (6a) and barrier layers (6b) made of different types of semiconductor layers. The well layers are formed from thin gallium indium nitride layers. The blocking layers are formed from thicker gallium nitride layers. An active quantum well made of gallium indium nitride (6c) adjoins the uppermost blocking layer. Super-lattices are formed by the well layers and the blocking layers. The well layers are thinner than 3 nm, and the blocking layers are 5 nm thick or thicker.
Abstract:
The buffer layer (2) is deposited onto the substrate (1) at a first temperature. A layer (3) forming part of the connecting semiconductor layer structure (4) is added in the direction of growth, onto the buffer layer. Layer (3) is grown at a lower temperature. An Independent claim is included for the corresponding light-emitting semiconductor chip.
Abstract:
The invention relates to an optical semiconductor device comprising a multip le quantum well structure, in which well layers and barrier layers consisting o f different types of semiconductor layers are stacked alternately on top of on e another. The invention is characterised in that the well layers (6a) have a first composition, based on a nitride semiconductor material with a first electron energy and the barrier layers (6b) have a second composition based on a nitride semiconductor material with a higher electron energy in relation t o the first electron energy. An active radiative quantum well layer (6c) is located downstream of said layers in the epitaxial direction and the essentially non-radiative well layers (6a) positioned upstream, together wit h the barrier layers (6b) form a superlattice for said active quantum well lay er.
Abstract:
The invention relates to an optical semiconductor device comprising a multiple quantum well structure, in which well layers and barrier layers consisting of different types of semiconductor layers are stacked alternately on top of one another. The invention is characterised in that the well layers (6a) have a first composition, based on a nitride semiconductor material with a first electron energy and the barrier layers (6b) have a second composition based on a nitride semiconductor material with a higher electron energy in relation to the first electron energy. An active radiative quantum well layer (6c) is located downstream of said layers in the epitaxial direction and the essentially non-radiative well layers (6a) positioned upstream, together with the barrier layers (6b) form a superlattice for said active quantum well layer.