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Fig. 8. (a) Typical photograph of LED-I without current driving.

Fig. 7. Typical I-V characteristics and dynamic resistances of the LED-I and LED-II. The inset shows the forward I-V characteristics. Fig. 8. (a) Typical photograph of LED-I without current driving. (b) and (c) Typical near-field emission images of the LED-I and the LED-II, respectively.

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LED I:

After 5000 h, it was found that the average 350 mA EL intensity (output power) values decreased from:. In other words, the EL intensity decreased by 24%, 30% and 55% for LED-I, II,and III, respectively. LED III :. LED II :. LED I:. 14. Conclusion.

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Results and Discussion

Results and Discussion. Fig. 6. Simulated relative EQE as functions of current density for conventional LED, LED I, LED II, and LED III. 7. Conclusion. The SGQB LED with its ?fth barrier graded shows improve- ments in both droop behavior and radiative recombination.

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Led ii - PowerPoint PPT Presentation

Fig. 8. (a) Typical photograph of LED-I without current driving.

LED I:

Results and Discussion