Fig. 1From: Improving the Current Spreading by Locally Modulating the Doping Type in the n-AlGaN Layer for AlGaN-Based Deep Ultraviolet Light-Emitting Diodesa Schematic structures for the NPN-AlGaN LED. b Schematic conduction band profile for the NPNPN-AlGaN structure having two NPN-AlGaN junctions; we define the barrier heights for each NPN-AlGaN junction as φ1, φ2, and φn, and n is the number of NPN-AlGaN junctionBack to article page