metarial science engineering

metarial science engineering

3.) At room temperature the electrical conductivity of PbTe is 500(\Omega-m)^{-1} whereas the electron and hole mobilities are 0.16 and 0.075 \mathrm{~m}^{2} / \mathrm{V}-s, respectively. Compute the intrinsic carrier concentration for PbTe at room temperature.

a) 1.33 \times 10^{20} \mathrm{~m}^{-3}

b) 1.33 \times 10^{23} \mathrm{~m}^{-3}

c) 1.33 \times 10^{22} \mathrm{~m}^{-3}

d) 2.13 \times 10^{3} \mathrm{~m}^{-3}

e) 2.13 \times 10^{5} \mathrm{~m}^{-3}