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Modeling the thin film transistors--considering metal contact resistaance

Posted Nov 28, 2014, 9:35 a.m. EST 1 Reply

Sajedeh Manzeli
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Hi,

I am modeling a transistor based on semi-2D materials such as graphene. The model which is built in 3D for now just includes the channel made of graphene (Thickness 0.6 nm). In the "Electrical current" physics I define the drain voltage as an "Electrical potential" boundary condition for one of the side surfaces and the source voltage as a "ground" boundary condition for the other side surface. Then I calculate the current flow through the graphene channel in the stationary study.

The problem is that in the real case of my devices, the graphene thin film is contacted electrically with gold electrodes. There is always some contact resistance between electrode contacts and the graphene. I would like to also include the effect of this resistance in the calculation of current but I don't know how it would be possible? The contact resistance depends on the electron affinity of the gold contacts.
Thanks,
1 Reply Last Post Mar 7, 2016, 12:32 a.m. EST
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Hello Sajedeh Manzeli

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Rishad Arfin
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Posted: 9 years ago Mar 7, 2016, 12:32 a.m. EST
Hello. I am also trying to simulate Graphene in COMSOL. I am actually trying to use the graphene as a channel in MOSFET. I suppose, I have to use semiconductor module for that but I was wondering how can I define Graphene as there is a list of parameters required for graphene to define in Semiconductor module. Can you please help me with this. I feel like I stuck here.

Thanks! I am waiting for your response.
Hello. I am also trying to simulate Graphene in COMSOL. I am actually trying to use the graphene as a channel in MOSFET. I suppose, I have to use semiconductor module for that but I was wondering how can I define Graphene as there is a list of parameters required for graphene to define in Semiconductor module. Can you please help me with this. I feel like I stuck here. Thanks! I am waiting for your response.

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