$useBTBT

Modeling the band to band tunneling with the BTBT formalism. g a e f0 p exp -b e a2 e f0 p2 exp -b2 e f0 is set as 1v cm if only a is used please set a2 0.0 b2 0.0 p2 0.0 g cm -3 s -1 a cm -3 s -1 b mv cm example usebtbt a b p a2 b2 p2 a b p a2 b2 p2 a b p a2 b2 p2 a b p a2 b2 p2 each layer you will need to set the a b p coefficient. if you don't want to consider btbt in this layer please set a and a2 0.0