Photodetectors: Self-Assessment Questions

Listed below are the self-assessment questions for the video on Photodetectors:

1. What is the order of the band gap size in conductors, insulators, and semiconductors from largest to smallest energy difference?
2. In forward biasing of a photodetector, the p-side of the p-n junction faces the (positive or negative) side of the circuit. In reverse biasing, the p-side of the p-n junction faces the (positive or negative) side of the circuit.
3. Which region of a photodetector p-n junction has electrons? Which region has holes?
4. In photovoltaic mode, the photodetector acts like a(n) _____ and creates a voltage difference between the anode and cathode. In photoconductive mode, the photodetector acts as a(n) _____ and produces a current, assisted by a reverse bias.

Follow this link to check your answers to the self-assessment questions (SAQ) above.