i read in an online course about semiconductors that electric field between [tex]E_c[/tex] and [tex]E_v[/tex](adsbygoogle = window.adsbygoogle || []).push({});

given by:

[tex]E=\frac{dE_c}{q dx}[/tex]

and i know the general form of electric field is :

[tex]E=\frac{k.q_0.q}{r^2}[/tex]

and what is the direction of this feild ,i know from positive to negative , from [tex]E_c[/tex] to [tex]E_v[/tex]? because both [tex]E_c[/tex] & [tex]E_c[/tex] have electrons and holes

and dose any one know what is [tex]\mu_n[/tex] electron mobilities

thank you very much!

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# Electric field between bands in semiconductors

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