Actually (q*hbar) gives 1.05e-34, however, still it doesn't give any clue why the probability is almost insensitive to the change of deltaPhi/relevant length scale/bandgap :( Anyone can help please?
I'm calculating the band-to-band probability using the WKB approximation given by T=exp(-4*lamda*sqrt(2*m*Eg^1.5)/(3*q*hbar*(deltaPhi+Eg))). I am wondering which unit of the plank constant is used here? The one in J-s which is 6.62e-34 or in eV-s which is 4.13e-15? However, the former one...