tidy3d.ShockleyReedHallRecombination

tidy3d.ShockleyReedHallRecombination#

class ShockleyReedHallRecombination[source]#

Bases: Tidy3dBaseModel

Defines the parameters for the Shockley-Reed-Hall (SRH) recombination model.

Parameters:

  • attrs (dict = {}) – Dictionary storing arbitrary metadata for a Tidy3D object. This dictionary can be freely used by the user for storing data without affecting the operation of Tidy3D as it is not used internally. Note that, unlike regular Tidy3D fields, attrs are mutable. For example, the following is allowed for setting an attr obj.attrs['foo'] = bar. Also note that Tidy3D` will raise a TypeError if attrs contain objects that can not be serialized. One can check if attrs are serializable by calling obj.json().

  • tau_n (Union[PositiveFloat, FossumCarrierLifetime]) – Electron lifetime

  • tau_p (Union[PositiveFloat, FossumCarrierLifetime]) – [units = sec]. Hole lifetime

Notes

The recombination rate parameter from this model is defined from [1] as follows:

\[R_{SRH} = \frac{n p - n_0 p_0}{\tau_p \left(n + \sqrt{n_0 p_0}\right) + \tau_n \left(p + \sqrt{n_0 p_0}\right)}.\]

Note that the electron and holes densities are defined within the SemiconductorMedium. The electron lifetime \(\tau_n\) and hole lifetimes \(\tau_p\) need to be defined.

Example

>>> import tidy3d as td
>>> default_Si = td.ShockleyReedHallRecombination(
...   tau_n=3.3e-6,
...   tau_p=4e-6,
... )

Note

Important considerations when using this model:

  • Currently, lifetimes are considered constant (not dependent on temperature or doping).

  • This model represents mid-gap traps Shockley-Reed-Hall recombination.

Attributes

attrs

Methods

Inherited Common Usage

tau_n#
tau_p#
__hash__()#

Hash method.