Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Electrostatics and Transport of dilute species
Posted May 12, 2013, 2:28 p.m. EDT Semiconductor Devices 1 Reply
Please login with a confirmed email address before reporting spam
Hi all,
I am modelling a pn junction using the coupled electrostatic and transport of dilute species physics module for weeks now without any success. I followed the model in tutorial provided on comsol model gallery but encountered the following problems:
(1) I got an I-V plot for the model but when I plot current density as function of applied voltage, it gives 0 A/m^2 at any applied voltage which is strange.
(2) I do not fully understand the expression for cathode current (Ic) used in the tutorial. what does the Lagrange multipliers cn_lm and cp_lm do in Ic expression.
(3) After perturbing the system by including the generation term, I did not see any change in the I-V plot.
(4) Even when I set the recombination and generation term to zero, I still get I -V plot...I am confused about this.
Please, can someone help me out? I attached my file below.
Thanks
I am modelling a pn junction using the coupled electrostatic and transport of dilute species physics module for weeks now without any success. I followed the model in tutorial provided on comsol model gallery but encountered the following problems:
(1) I got an I-V plot for the model but when I plot current density as function of applied voltage, it gives 0 A/m^2 at any applied voltage which is strange.
(2) I do not fully understand the expression for cathode current (Ic) used in the tutorial. what does the Lagrange multipliers cn_lm and cp_lm do in Ic expression.
(3) After perturbing the system by including the generation term, I did not see any change in the I-V plot.
(4) Even when I set the recombination and generation term to zero, I still get I -V plot...I am confused about this.
Please, can someone help me out? I attached my file below.
Thanks
Attachments:
1 Reply Last Post May 13, 2013, 11:30 a.m. EDT
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Hi, we have just released a Semiconductor Module which makes it much easier to model PN junctions:
www.comsol.com/products/semiconductor/
I recommend trying this product to solve your problem.
www.comsol.com/products/semiconductor/
I recommend trying this product to solve your problem.