Efficiency enhancement in GaN-based blue to blue-violet LDs by engineered nitride-oxide ohmic contacts - OxyGaN

Project summary

The objective of the project is to increase the efficiency of GaN blue to blue-violet laser diodes by introducing a novel contact scheme utilizing a bandgap-engineered transparent conducting oxide, ZnMgO:Al with contact interface engineering. Overcoming the standing issues related to contact formation to vertical GaN-based opto/electronic devices, contact structures will be developed, raising the device efficiency by forming stable ohmic contacts to both n- and p-type surfaces, acting as both the metallization and waveguide for p-GaN, fabricated using means taking into account a simplified process integration and resource management. The technology steps developed in the project will be finally integrated in a packaged laser diode demonstrator and the technology will be prepared for implementation on the production line of one of the partners, enabling resource-sustainable, more energy-efficient diodes for automotive, display, welding and patterning industries at lowered costs.