LEDs:
1. Nanostructure LEDs
*Nanorod LED arrays from device physics to device characterizations
*Photonic crystals
*microwave optics
2. Nonpolar/Semipolar LEDs
3. AlN/GaN templates for epi-growth
Biophotonics
1. Transistor protein sensors
2. Nanorod/nanowire cancer cell probes
IGZO TFTs
1. Device design, fabrication and characterizations
2. Circuit design, fabrication and characterizations
3. Stress/reliability analysis
Power devices
1. GaN Schottky barrier diodes on Si substrate
2. E-mode/D-mode GaN HEMTs on Si substrate