The energy gap of silicon is 1.1 , eV. At wha | vedclass

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

Question

(A) The energy gap of silicon is given as $E_g = 1.1 \, eV$. To find the maximum wavelength $\lambda$ that can be absorbed,we use the relation $E_g =

Vedclass · Accepted Answer

$11272$

Vedclass · Answer

(A) The energy gap of silicon is given as $E_g = 1.1 \, eV$. To find the maximum wavelength $\lambda$ that can be absorbed,we use the relation $E_g = \frac{hc}{\lambda}$. Substituting the values: $h = 6.63 	imes 10^{-34} \, J \cdot s$,$c = 3 	imes 10^8 \, m/s$,and $1 \, eV = 1.6 	imes 10^{-19} \, J$. $\lambda = \frac{hc}{E_g} = \frac{6.63 	imes 10^{-34} 	imes 3 	imes 10^8}{1.1 	imes 1.6 	imes 10^{-19}} \, m$. $\lambda \approx 1.13 	imes 10^{-6} \, m = 11272 \, \mathring A$. Photons with wavelengths longer than this will not have enough energy to excite electrons across the band gap.

The energy gap of silicon is $1.1 \, eV$. At what wavelength will silicon stop absorbing photons? (in $\mathring A$)

Similar Questions

What is the crystalline structure of an intrinsic semiconductor?

$GaAs$ (Gallium Arsenide) is a ....... .

If the energy gap of a substance is $5.4 \ eV$,then the substance is

The resistivity of a semiconductor at room temperature is in between

State the conductivity of metals and resistivity of insulators.

Vedclass Test Series

Exam Paper Generator

Online Exam Module