## [HW5 Q2.5]

Hi,

I'm unsure how to go about question 2.5 (and as far as I've seen, other people are having the same problem as well). I'm guessing it's the LHS of the conditions we have to rewrite, so I've managed to find a relation between both `E_{CB}(x\rightarrow\infty)`

and `E_{CB}(x=0)`

based on `\psi_{B0}`

but struggle to make use of the bandgap and especially `n_{B0}`

(do we even need it in the expression since B is intrinsic?).
What I have so far is the following:

`\psi_{B0}=-E_{FB}/e`

with `E_{FB}=E_{CB}-1/2*E_{gB}`

-- but here `E_{CB}`

corresponds to conduction band energy before contact, so this is where I get stuck (unless we can assume that it's equal to the `E_{CB}`

far from the interface after contact??)...

Could you please let me know if I'm going in the right direction, or if there's something wrong in my reasoning?