Lateral pn junctions for high-density LED arrays
A light-emitting diode array was fabricated using a lateral pn junction to inject carriers in the InGaAs active layer. The lateral pn junction is formed in GaAs epilayers doped only with silicon and grown by molecular beam epitaxy on a patterned GaAs (311)A-oriented substrate. This design allows the use of electrically insulating carrier-confining barriers and coplanar contacts while simplifying device process. Light emission is uniform all over the 1200dpi array and electroluminescence spectrum has a single peak at 960 nm.
lateral pn junction light-emitting diode molecular-beam epitaxy