Schematic diagram of LED with backside reflector composed of TiO2/Al2O3 DBR and Al mirror grown on backside of PSS. Insets: SEM images of fabricated DBR and PSS (Figure 1). LOP of fabricated LEDs versus injection current(a). Inset: electroluminescence spectra. Photographs of LEDs (b and c) with and without backside reflector in operating state, respectively (Figure 2)

Schematic diagram of LED with backside reflector composed of TiO2/Al2O3 DBR and Al mirror grown on backside of PSS. Insets: SEM images of fabricated DBR and PSS (Figure 1). LOP of fabricated LEDs versus injection current(a). Inset: electroluminescence spectra. Photographs of LEDs (b and c) with and without backside reflector in operating state, respectively (Figure 2)