typo fix

66c93c7f · Anton Akhmerov · d28cdd8d · 66c93c7f
Commit 66c93c7f authored 5 years ago by Anton Akhmerov
--- a/src/14_doping_and_devices.md
+++ b/src/14_doping_and_devices.md
@@ -86,7 +86,7 @@ $$n_e - n_h + n_D - n_A = N_D - N_A$$

 We already know $n_e$ and $n_h$.

-$$n_D = N_D \frac{1}{e^{(E_D-E_F)/kT} + 1}, n_A = N_A \frac{1}{e^{-(E_A+E_F)/kT} + 1}$$
+$$n_D = N_D \frac{1}{e^{(E_D-E_F)/kT} + 1}, n_A = N_A \frac{1}{e^{(E_F-E_A)/kT} + 1}$$

 Simplification: