Fig. 1. Spectral ranges of emission for different quantum dots^［10］

Fig. 2. The routes for generating excitons in QDs.（a）Optical excitation；（b）Charge injection；（c）Energy transfer；（d）Electric field ionization；（e）Structure and energy band diagram of a typical QLED^［25］.

Fig. 3. （a）QLED device structure；（b）Flat-band energy level diagram；（c）Electroluminescence spectrum and illuminated photograph of a device；（d）EQE at different current density ^［40］.

Fig. 4. Schematic illustration for QD-OLED display panel^［48］

Fig. 5. Mechanism of color conversion full-color display^［49］

Fig. 6. Process flow of the full-color microdisplay based on aerosol jet technique^［60］

Fig. 7. Process flow of the color conversion layer using quantum dots photoresist^［63］