Intrinsic carrier concentration formula

[aarnes]

In the n_i=$\sqrt{Nc*Nv}*e^{\frac{-Eg}{2kT}}$ formula for intrinsic carrier concentration, what values N_c,N_v and E_g take in relation to temperature? Are they each calculated for that temperature or, for example, is E_g always taken for 300K? My guess is they should all be calculated for given temperature but that would mean some solved problems I got my hands on are wrong. In them, E_g is always taken to be 1.196eV.

 

[reddvoid]

Yes, Nc ,Nv and Eg are functions of temperature, you should take into account changes in Nc Nv when temperature is not 300k
but I think you can neglect change in Eg, you can consider it too if you want more accurate answer