In a light emitting diode (LED),light is emit | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) light emitting diode $(LED)$ is a heavily doped $p-n$ junction diode. When the diode is forward-biased,electrons from the $n$-region and holes fro

Vedclass · Accepted Answer

recombination of holes and electrons.

Vedclass · Answer

(C) light emitting diode $(LED)$ is a heavily doped $p-n$ junction diode. When the diode is forward-biased,electrons from the $n$-region and holes from the $p$-region are injected into the junction region. In the junction region,these charge carriers undergo recombination. During the process of recombination,the energy released is in the form of photons. If the semiconductor material has a suitable band gap,the energy of the emitted photons corresponds to the visible light spectrum. Therefore,the light emission is due to the recombination of holes and electrons.

In a light emitting diode $(LED)$,light is emitted due to:

Similar Questions

$A$ $p-n$ junction is fabricated from a semiconductor with a band gap of $2.8 \ eV$. What approximate wavelength can it $NOT$ detect (in $nm$)?
[Use $h = 6 \times 10^{-34} \ J \cdot s$ and $c = 3 \times 10^8 \ m/s$]

Which one of the following statements is $WRONG$ regarding $LED$?

The $V-I$ characteristics of an $LED$ are correctly shown by which graph?

The photodiode is used to detect optical signals. These diodes are preferably operated in reverse biased mode because:

Identify the incorrect statement.

Vedclass Test Series

Exam Paper Generator

Online Exam Module