Micro-pixelated gallium nitride-based light emitting diodes: fabrication, efficiency studies and applications

Speaker:Dr. Peng-fei Tian (Strathclyde Univ)

Time and Date: 10:00-11:00, Jun. 12, 2014

Place: Room 138, Physics Building, Handan Campus

 

 

Abstract

In recent years, micro-pixelated gallium nitride (GaN)-based light emitting diodes (micro-LEDs) have demonstrated wide applications in self-emissive micro-display, single-chip high voltage alternating-current LEDs for solid state lighting, visible light communication, direct LED writing and optogenetics, due to their special properties of micro-size and superior heat dissipation. In addition, efficiency droop at high current has been a large barrier for the wide application of LEDs in general lighting. In this talk, the size- and temperature-dependent efficiency droop of micro-LEDs will be analysed, providing a deep understanding of droop mechanisms and also demonstrating the advantages of micro-LEDs to alleviate efficency droop. Also, new-type micro-LEDs on flexible metal substrates and Si substrates have been developed to expand the applications and to reduce the fabrication cost of micro-LEDs, respectively.