QuantumATK Forum
QuantumATK => General Questions and Answers => Topic started by: Lim changmin on July 8, 2024, 03:58
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Hello, I am trying to dope amorphous silicon bulk structure with n, p-type and then try to calculate transmission spectrum, the results shows same.
I calculated same structure and just changed the type of doping.
I attached the py file that I used.
The only difference I made is n and p type doping
external_potential = AtomicCompensationCharge([
('doping_0', 2.0207760480856165e-07)
]) for n-type and
external_potential = AtomicCompensationCharge([
('doping_0', - 2.0207760480856165e-07)
]) for p-type
The transmission results appear same, so I attached only 1 figure.
So I was wondering if the results can show same results even if the doping is different
Thank you
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This is because you never apply the doping to any atoms, so it's not active.
However, it anyway would not make much sense to use this charge doping method for a bulk structure, because all it really does it shift the Fermi level. It's a technique that can be used in an interface like a p-n junction to shift the Fermi level differently in two parts of the system, to mimic n or p doping. But in a bulk crystal, it will just rigidly shift the zero level reference, and the transmission remains the same.
It's a bit hard to see what the purpose of bulk transmission for an amorphous material would be, but perhaps you should just add an explicit dopant atom (and then I would look at the DOS, not transmission).