1. Nanowire-based polychromatic Leds ultra-efficient rgb LEDs based on nanowire technology
Olof Hultin, RISE Acreo

2. Challenge: Low efficiency in green and red nitride LEDs

3. Solution: Nano-LEDs with InGaN barrier layers
InGaN with high material quality can be achieved in nanostructures
A method to reshape nanowire based structures to exhibit flat c- planes has been developed in Lund
High In-content, dislocation-free, InGaN c-planes
 Efficient green and red LEDs

4. Highlights project 1
Crystal growth conditions optimized for high In composition (up to 18%), Bi et al. J. Appl. Phys 2018
Nano-LEDs realized in blue, green, yellow and red, Bi et al. Submitted 2018
Characterization methods developed
Devices and setup for electroluminescence
Cathodoluminescence
AFM for local current injection
Single platelet electroluminescence

5. Project 2 outline
Further exploration and optimization of growth parameters and methods
Optimize device structure
Scale up chip size
Improve homogeneity
Characterize devices and provide feedback for epitaxy
Develop new optimized device design
Develop process for packaging
Implement more advanced characterization methods
Fabricate demonstrators