(a) Explain drift and diffusion currents in semiconductors and derive…
Previous year question for Advanced Engineering Physics.
Question
(a) Explain drift and diffusion currents in semiconductors and derive their governing equations. Also state and derive the Einstein relation and discuss its significance in the operation of a PN junction.
(b) Calculate the value of Hall voltage across the width of a semiconductor specimen from the following data : Width of specimen = $0.1\text{ m}$, thickness of the specimen = $0.01\text{ m}$, field applied perpendicular to width and length = $0.6\text{ T}$, current flowing lenthwise = $10\text{ mA}$, Hall coefficient = $3.8 \times 10^{-4}\text{ m}^3\text{/C}$.
- Year: 2022
- Subject: Advanced Engineering Physics