Patent ID: 9634190
Date: 2017-04-25
CPC Classifications: H01L

Claim:
1. A white light-emitting device comprising: a substrate; a diamond semiconductor layer provided on the substrate, the diamond semiconductor layer comprising one or more p-type α layers, a p-type or n-type γ layer, and at least one n-type β layer laminated in this order from the substrate; a first electrode provided on the α layer, the first electrode positioned and configured to inject an electric current; a second electrode provided on the β layer, the second electrode positioned and configured to inject an electric current; and a fluorescent member which coats a light emission extraction region of the surface of the diamond semiconductor layer, wherein a concentration of impurities contained in the γ layer is adjusted such that the integrated value A within the blue light range at wavelength 450 nm or more and 500 nm or less has a relationship to the integrated value B within the deep ultraviolet light range at wavelength 300 nm or less, the relationship being that the integrated value A is at least 1 and at most 10 times the integrated value B.