For a GaAs light emitting diode: (a) What wavelength of light is emitted? (b) If a...

 

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For a GaAs light emitting diode: (a) What wavelength of light is emitted? (b) If a current of 300 µA is injected into the device, and the device has a quantum efficiency of 10%, what is the light power emitted? (c) Is the device in (b) under forward or reverse bias? (d) Draw the energy band diagram of the LED when it is emitting light. Label all relevant energies. It is a one sided junction with Np = 10" cm. Assume a carrier lifetime of 10 ns and that current is dominated by recombination. For a GaAs light emitting diode: (a) What wavelength of light is emitted? (b) If a current of 300 µA is injected into the device, and the device has a quantum efficiency of 10%, what is the light power emitted? (c) Is the device in (b) under forward or reverse bias? (d) Draw the energy band diagram of the LED when it is emitting light. Label all relevant energies. It is a one sided junction with Np = 10" cm. Assume a carrier lifetime of 10 ns and that current is dominated by recombination.