Fig. 5. External quantum efficiencies of LEDs grown on CSS, BPSS, HPSS,and CPSS.

Fig. 4. Far-field pattern of LEDs grown on CSS, BPSS, HPSS, and CPSS with an injection current of 400 mA. 6

Fig. 5. External quantum efficiencies of LEDs grown on CSS, BPSS, HPSS,and CPSS. 7

Conclusion The LED with ball-shape patterned sapphire substrate has the best crystalline quality and I–V characteristic. For the purpose of reducing total internal reflection, the LED with HPSS has the best performance on output power and external quantum efficiency. Comparing to the LED without patterned substrate, the LED with HPSS has 175% and 165% enhancement on output power and external quantum efficiency, respectively. 8

References 世界材料網http://www.materialsnet.com.tw/DocView.aspx?id=10359 LED效率 http://laislab.myweb.hinet.net/led-1.htm 9

Thank you for your attention 10

Fig. 5. External quantum efficiencies of LEDs grown on CSS, BPSS, HPSS,and CPSS.

Fig. 5. External quantum efficiencies of LEDs grown on CSS, BPSS, HPSS,and CPSS.

Presentation Transcript

FIG.5

HPSS

Fig. 5

Fig. 5-2

Fig. 17-5

Fig. 5. L–I characteristics of three LEDs.

Yellowstone and HPSS

SI Fig. 5

Summary of efficiencies on ppg measurement

Fig. 5

Creating a Webpage with External CSS

Overview of BPSS

Quantum efficiencies of the XIS CCDs onboard Suzaku

HPSS Features and Futures

Ordered Quantum Wire and Quantum Dot Heterostructures Grown on Patterned Substrates

Status of HPSS

Supplementary Fig. 5

Quantum Dot White LEDs

Fig. 5

fig 5-25

Quantum efficiencies of the XIS CCDs onboard Suzaku

HPSS Features and Futures