INVESTIGATING SEMICONDUCTOR QUANTUM DOTS FOR SOLID STATE LIGHTING

摘要

1. Luminous output of CdS, CdSe QDs lower than CdSe/ZnS QDs and phosphors. 2. CdS QDs can exhibit fast exponential decay or slow stretched exponential decay. 3. Concentratbn of QDs in epoxy was increased to absorb nearly all excitation light. 4. QD-LEDs were fabricated with high luminous efficiencies: 4.1 9,8 Im/W (blue); 4.2 16.6 Im/W (blue-green); 4.3 3.5 im/W (white). rn5. Blue-green QD-LED efficiency exceeds that of incandescent lamps by 10%.rn6. QDLEDs have some problems with decreased visible light conversion over timernand with increasing drive current.rn7.CdS QDs in epoxy and silicone exhibit thermal degradation after exposure torn200℃.rn8. Nanophosphors should be investigated for white LEDs with bw scattering,rnthermal stability, and high conversion efficiency.