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Please describe the lighting history

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Reference no: EM13860562

1. Please describe the lighting history.

2. Please describe the lighting principle of PN junction based solid state lighting.

3. The bandgap energy of Eg of  Ga1-xAlxAs depends on x through the following approximate equation Eg (x) = (1.424 + 1.247x)eV.  Please calculate the bandgap energy and the corresponding output wavelengths for x = 0.1 and 0.5.

4. What is the function of hetereo structure for LED?

5. What is the function of quantum well for LED?

6. How to adjust the bandgap of LED?

Reference no: EM13860562

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