tidy3d.FossumCarrierLifetime

class FossumCarrierLifetime

Bases: Tidy3dBaseModel

Parameters for the Fossum carrier lifetime model

Parameters:

• tau_300 (PositiveFloat) – [units = sec]. Carrier lifetime at 300K

• alpha_T (float) – Exponent for thermal dependence

• N0 (PositiveFloat) – [units = 1/cm^3]. Reference concentration

• A (float) – Constant A

• B (float) – Constant B

• C (float) – Constant C

• alpha (float) – Exponent constant

Notes

This model expresses the carrier lifetime as a function of the temperature and doping concentration.

\[\tau = \frac{\tau_{300} \left( T/300 \right)^\alpha_T}{A + B (N/N_0) + C (N/N_0)^\alpha}\]

Example

>>> import tidy3d as td
>>> default_Si = td.FossumCarrierLifetime(
...   tau_300=3.3e-6,
...   alpha_T=-0.5,
...   N0=7.1e15,
...   A=1,
...   B=0,
...   C=1,
...   alpha=1
... )

References

Fossum, J. G., and D. S. Lee. “A physical model for the dependence of carrier lifetime on doping density in nondegenerate silicon.” Solid-State Electronics 25.8 (1982): 741-747.

Attributes

tau_300
alpha_T
N0
A
B
C
alpha

tau_300

alpha_T

N0

A

B

C

alpha