Charge Carriers in Semiconductors
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Questions and Answers

Semiconductors have only one type of charge carrier, either electrons or holes

False

The electronic density of states is a measure of the energy levels available to a carrier

True

The effective density of states function in the valence band (Nν) is given by the equation $N_{\nu} = 2\left(\frac{2\pi m_{p}^{*}kT},{h^2}\right)^{3/2}$

True

The thermal equilibrium concentration of holes in the valence band is given by the equation $P_{o} = N_{\nu} \exp\left(\frac{E_{F}-E_{\nu}},{kT}\right)$

<p>True</p> Signup and view all the answers

The magnitude of Nν is also on the order of $10^{19} cm^{-3}$ at $T=300K$ for most semiconductors

<p>True</p> Signup and view all the answers

Semiconductors can have two types of charge carriers, the electron and the ______

<p>hole</p> Signup and view all the answers

The parameter $m_{p}^{*}$ in the equation for the effective density of states function in the valence band represents the density of states effective mass of the ______

<p>hole</p> Signup and view all the answers

The electronic density of states function is defined as the number of states per unit volume per unit energy, or the concentration of states per unit energy. Therefore, the following quantity gives the concentration of states in a differential energy segment from (E) to (E + dE), the ______

<p>density of states</p> Signup and view all the answers

The thermal equilibrium concentration of holes in the valence band is given by the equation $P_{o} = N_{\nu} \exp\left(\frac{E_{F}-E_{\nu}},{kT}\right)$. In this equation, $P_{o}$ represents the thermal-equilibrium ______ concentration

<p>hole</p> Signup and view all the answers

The magnitude of Nν is also on the order of $10^{19} cm^{-3}$ at $T=300K$ for most ______

<p>semiconductors</p> Signup and view all the answers

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