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Fig. 1 | Nanoscale Research Letters

Fig. 1

From: On the p-AlGaN/n-AlGaN/p-AlGaN Current Spreading Layer for AlGaN-based Deep Ultraviolet Light-Emitting Diodes

Fig. 1

a Schematic diagrams for the studied devices (reference LED A and PNPNP-AlGaN LED), b schematic diagrams for the PNP-AlGaN structure with two PNP-AlGaN junctions, c schematic valence band diagram for the PNP-AlGaN structure with multiple PNP-AlGaN junctions, in which φ1, φ2, and φn denote the barrier height for each PNP-AlGaN junction along the [0001] orientation and n represents the PNP-AlGaN junction number

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