Advertisements
Advertisements
Question
How is a photodiode fabricated?
Advertisements
Solution
A photodiode is fabricated by allowing light to fall on a diode through a transparent window. It is fabricated such that the generation of e-h pairs take place near the depletion region.
RELATED QUESTIONS
With what considerations in view, a photodiode is fabricated? State its working with the help of a suitable diagram.
Even though the current in the forward bias is known to be more than in the reverse bias, yet the photodiode works in reverse bias. What is the reason?
State its any ‘two’ uses of photodiode.
How does a light emitting diode (LED) work? Give two advantages of LED’s over the conventional incandescent lamps.
Write the important considerations which are to be taken into account while fabricating a p-n junction diode to be used as a Light Emitting Diode (LED). What should be the order of the band gap of an LED, if it is required to emit light in the visible range? Draw a circuit diagram and explain its action.
The wavelength and intensity of light emitted by a LED depend upon ______.
Explain the three processes involved in the working of a solar cell.
With reference to Semiconductor Physics,
Name the process that causes depletion region in a p-n junction.
Briefly explain how emf is generated in a solar cell.
Draw solar cells of I-V characteristics.
Draw the circuit diagram of an illuminated photodiode and its I-V characteristics.
