Patent ID: 8878232

Claim:
A method for producing a Group III nitride semiconductor light-emitting device comprising an MQW-structure light-emitting layer in which well layers, each comprising InGaN semiconductor, and barrier layers, each comprising AlGaN semiconductor and having a bandgap energy greater than that of the well layers, are alternately stacked in a repeated manner, the method comprising: forming a well layer at a first temperature from 750° C. to 850° C., and forming a barrier layer at a second temperature from 850° C. to 950° C. which is higher than the first temperature; and forming a capping layer of AlGaN having an Al compositional ratio, which is equal to or lower than that of the barrier layer is formed, on the well layer at the first temperature, wherein a straight line −2.8x+100y=D (λ) is determined according to an emission wavelength λ, y is determined within a range of 0.65≦y≦0.86, x is obtained by substituting the determined y value for y in the equation of −2.8x+100y=D (λ), and an In compositional ratio (mol %) of the well layer is determined from the x and y values so as to satisfy the following relations: 12.9≦−2.8x+100y≦37 and 0.65≦y≦0.86, here x represents the Al compositional ratio (mol %) of the barrier layer which is defined as a ratio of a number of moles of Al to a number of moles of total Group III atoms of the barrier layer, and y represents a difference in bandgap energy (eV) between the barrier layer and the well layer, and wherein a thickness of the capping layer falls within a range from 1 monolayer to 8 monolayers.