I know about E-H pair generation because of which in an intrinsic semiconductor the numbers of free electrons=number of holes. In terms of Fermi level, fermi level shifts when the temperature is varied and the product of the density of states and fermi function becomes asymmetrical. How it is then that electron conc. remains equal to hole concentration ?
With temperature Ef changes . Depending on the effective masses, Ef shifts either towards CB or VB. How is concentration still maintained from these equations in the picture?