720563Seren Photonics - Development of 4" semipolar GaN templates for next generation Solid State LightingClosedGRD Development of PrototypeInnovate UKThe focus of this project is to demonstrate the feasibility of creating high quality low defect density semi-polar GaN templates on 4” diameter wafers. To date, Seren Photonics has demonstrated the ability to supply 2” diameter templates, which are currently being evaluated by several Tier 1 LED manufacturers. In order to ensure the technology’s acceptance as a commercially viable route to improving LED efficiency, reducing droop and enabling longer wavelength emission (green and yellow), it is essential to demonstrate and develop a 4” prototype that shows the true potential of the technology. The program will address the move to 4” using two methods for creating nano and microstructures on the wafers aimed at controlling and blocking defects. One using random patterns, the second using a fixed pattern. Key to success will be the demonstration of equivalent quality of crystal as seen on 2” and on demonstrating uniform performance across the 4” wafers.