Novel microLED concept for realization of the next generation of AR based micro-display applications

Important results from the project

The project has progressed well and achieved the set objective. Focus on developing monochrome green microLEDs with the goal of increasing the internal quantum efficiency (IQE) and external quantum efficiency (EQE). Higher EQE has been achieved by improving the light extraction efficiency (LEE). This also improve the light lobe, which is a narrower sub-Lambertian lobe, than our competitors. Integration between PLTs LED-frontplane with CMOS backplane has been realized using flip-chip technology.

Expected long term effects

There are several long-term effects that have been achieved. With the performance that has been achieved, we see a great potential in the LED display area, primarily green microLEDs for military applications. But there is also perhaps an even greater potential for monochrome microLEDs in the optical interconnect area. This is an AI-boosted area where energy consumption is a central parameter. Our pyramidal LEDs are well suited for this application area.

Approach and implementation

Phase 1 - Design of pyramidal micro-LED structures (Linköping) - Cultivation of LED structures in RISE MOCVD reactor (Lund) - Characterization; optical, structural, electrical (Linköping and Chalmers) - Processing (Chalmers) Denna loop together with simulations (Chalmers). Phase 2 - Optimization of doping and contacts - Identification of defects and optimization of IQE - Optimization of light extraction (LEE) to increase EQE Phase 3 - Customer contacts for evaluation - Delivery test kits

External links

Webbsida av koordinerande projektpart