A non-degenerate n-type semiconductor has $5 \%$ neutral dopant atoms. Its Fermi level is located at $0.25 \mathrm{eV}$ below the conduction band $\left(E_{C}\right)$ and the donor energy level $\left(E_{D}\right)$ has a degeneracy of $2$. Assuming the thermal voltage to be $20 \mathrm{mV}$, the difference between $E_{C}$ and $E_{D}$ (in $\mathrm{eV}$, rounded off to two decimal places) is $\_\_\_\_\_\_\_$.