DriftDiffusion2D Class¶

class electrical.ddm2d.DriftDiffusion2D(name='')¶: Finite element drift-diffusion electrical solver for 2D Cartesian geometry.

Methods¶

`compute`([loops])	Run drift-diffusion calculations
`find_energy_levels`()	Run energy levels calculations - TEST
`get_total_current`([nact])	Get total current flowing through active region (mA)
`initialize`()	Initialize solver.
`invalidate`()	Set the solver back to uninitialized state.

Attributes¶

Receivers¶

inTemperature

Receiver of the temperature required for computations [K].

Providers¶

`outBandEdges`	Provider of the computed conduction and valence band edges [eV].
`outCarriersConcentration`	Provider of the computed carriers concentration [1/cm³].
`outCurrentDensityForElectrons`	Provider of the computed current density [kA/cm²].
`outCurrentDensityForHoles`	Provider of the computed current density [kA/cm²].
`outFermiLevels`	Provider of the computed quasi-Fermi levels for electrons and holes [eV].
`outHeat`	Provider of the computed heat sources density [W/m³].
`outPotential`	Provider of the computed potential [V].

Other¶

`FullIon`	True if dopants are completely ionized
`Pol`	True if polarization effects are taken into account
`Raug`	True if Auger recombination is taken into account
`Rrad`	True if radiative recombination is taken into account
`Rsrh`	True if SRH recombination is taken into account
`SchottkyN`	Schottky barrier for n-type contact
`SchottkyP`	Schottky barrier for p-type contact
`algorithm`	Chosen matrix factorization algorithm
`geometry`	Geometry provided to the solver
`id`	Id of the solver object.
`initialized`	True if the solver has been initialized.
`iterative`	Iterative matrix parameters (see `IterativeParams`)
`loopsFn`	Loops limit for the electrons quasi-Fermi level
`loopsFp`	Loops limit for the holes quasi-Fermi level
`loopsV`	Loops limit for the potential
`loopsV0`	Loops limit for the built-in potential
`loopsVi`	Loops limit for the initial potential estimate
`maxerrFn`	Limit for the electrons quasi-Fermi level updates
`maxerrFp`	Limit for the holes quasi-Fermi level updates
`maxerrV`	Limit for the potential updates
`maxerrV0`	Limit for the built-in potential updates
`maxerrVi`	Limit for the initial potential estimate updates
`mesh`	Mesh provided to the solver
`voltage_boundary`	Boundary conditions of the first kind (constant potential)

Descriptions¶

Method Details¶

DriftDiffusion2D.compute(loops=0)¶: Run drift-diffusion calculations

DriftDiffusion2D.find_energy_levels()¶: Run energy levels calculations - TEST

DriftDiffusion2D.get_total_current(nact=0)¶: Get total current flowing through active region (mA)

DriftDiffusion2D.initialize()¶

Initialize solver.

This method manually initialized the solver and sets initialized to True. Normally calling it is not necessary, as each solver automatically initializes itself when needed.

Returns:: solver initialized state prior to this method call.
Return type:: bool

DriftDiffusion2D.invalidate()¶

Set the solver back to uninitialized state.

This method frees the memory allocated by the solver and sets initialized to False.

Receiver Details¶

DriftDiffusion2D.inTemperature = <property object>¶

Receiver of the temperature required for computations [K].

You will find usage details in the documentation of the receiver class TemperatureReceiver2D.

Example

Connect the receiver to a provider from some other solver:

>>> solver.inTemperature = other_solver.outTemperature

See also

Receciver class: plask.flow.TemperatureReceiver2D

Provider class: plask.flow.TemperatureProvider2D

Data filter: plask.filter.TemperatureFilter2D

Provider Details¶

DriftDiffusion2D.outBandEdges(n=0, mesh, interpolation='default') = <property object>¶

Provider of the computed conduction and valence band edges [eV].

Parameters:

n (int) – Value number.
mesh (mesh) – Target mesh to get the field at.
interpolation (str) – Requested interpolation method.

Returns:

Data with the conduction and valence band edges on the specified mesh [eV].

You may obtain the number of different values this provider can return by testing its length.

Example

Connect the provider to a receiver in some other solver:

>>> other_solver.inBandEdges = solver.outBandEdges

Obtain the provided field:

>>> solver.outBandEdges(0, mesh)
<plask.Data at 0x1234567>

Test the number of provided values:

>>> len(solver.outBandEdges)
3

See also

Provider class: plask.flow.BandEdgesProvider2D

Receciver class: plask.flow.BandEdgesReceiver2D

DriftDiffusion2D.outCarriersConcentration(n=0, mesh, interpolation='default') = <property object>¶

Provider of the computed carriers concentration [1/cm³].

Parameters:

type (str) – Detailed information which carriers are returned. It can be ‘majority’ to return majority carriers in given material, ‘pairs’ for the concentration of electron-hole pairs, ‘electrons’, or ‘holes’ for particular carriers type.
mesh (mesh) – Target mesh to get the field at.
interpolation (str) – Requested interpolation method.

Returns:

Data with the carriers concentration on the specified mesh [1/cm³].

You may obtain the number of different values this provider can return by testing its length.

Example

Connect the provider to a receiver in some other solver:

>>> other_solver.inCarriersConcentration = solver.outCarriersConcentration

Obtain the provided field:

>>> solver.outCarriersConcentration(0, mesh)
<plask.Data at 0x1234567>

Test the number of provided values:

>>> len(solver.outCarriersConcentration)
3

Receciver class: plask.flow.CarriersConcentrationReceiver2D

DriftDiffusion2D.outCurrentDensityForElectrons(mesh, interpolation='default') = <property object>¶

Provider of the computed current density [kA/cm²].

Parameters:

mesh (mesh) – Target mesh to get the field at.
interpolation (str) – Requested interpolation method.

Returns:

Data with the current density on the specified mesh [kA/cm²].

Example

Connect the provider to a receiver in some other solver:

>>> other_solver.inCurrentDensity = solver.outCurrentDensityForElectrons

Obtain the provided field:

>>> solver.outCurrentDensityForElectrons(mesh)
<plask.Data at 0x1234567>

See also

Provider class: plask.flow.CurrentDensityProvider2D

Receciver class: plask.flow.CurrentDensityReceiver2D

DriftDiffusion2D.outCurrentDensityForHoles(mesh, interpolation='default') = <property object>¶

Provider of the computed current density [kA/cm²].

Parameters:

mesh (mesh) – Target mesh to get the field at.
interpolation (str) – Requested interpolation method.

Returns:

Data with the current density on the specified mesh [kA/cm²].

Example

Connect the provider to a receiver in some other solver:

>>> other_solver.inCurrentDensity = solver.outCurrentDensityForHoles

Obtain the provided field:

>>> solver.outCurrentDensityForHoles(mesh)
<plask.Data at 0x1234567>

See also

Provider class: plask.flow.CurrentDensityProvider2D

Receciver class: plask.flow.CurrentDensityReceiver2D

DriftDiffusion2D.outFermiLevels(n=0, mesh, interpolation='default') = <property object>¶

Provider of the computed quasi-Fermi levels for electrons and holes [eV].

Parameters:

n (int) – Value number.
mesh (mesh) – Target mesh to get the field at.
interpolation (str) – Requested interpolation method.

Returns:

Data with the quasi-Fermi levels for electrons and holes on the specified mesh [eV].

You may obtain the number of different values this provider can return by testing its length.

Example

Connect the provider to a receiver in some other solver:

>>> other_solver.inFermiLevels = solver.outFermiLevels

Obtain the provided field:

>>> solver.outFermiLevels(0, mesh)
<plask.Data at 0x1234567>

Test the number of provided values:

>>> len(solver.outFermiLevels)
3

See also

Provider class: plask.flow.FermiLevelsProvider2D

Receciver class: plask.flow.FermiLevelsReceiver2D

DriftDiffusion2D.outHeat(mesh, interpolation='default') = <property object>¶

Provider of the computed heat sources density [W/m³].

Parameters:

mesh (mesh) – Target mesh to get the field at.
interpolation (str) – Requested interpolation method.

Returns:

Data with the heat sources density on the specified mesh [W/m³].

Example

Connect the provider to a receiver in some other solver:

>>> other_solver.inHeat = solver.outHeat

Obtain the provided field:

>>> solver.outHeat(mesh)
<plask.Data at 0x1234567>

See also

Provider class: plask.flow.HeatProvider2D

Receciver class: plask.flow.HeatReceiver2D

DriftDiffusion2D.outPotential(mesh, interpolation='default') = <property object>¶

Provider of the computed potential [V].

Parameters:

mesh (mesh) – Target mesh to get the field at.
interpolation (str) – Requested interpolation method.

Returns:

Data with the potential on the specified mesh [V].

Example

Connect the provider to a receiver in some other solver:

>>> other_solver.inPotential = solver.outPotential

Obtain the provided field:

>>> solver.outPotential(mesh)
<plask.Data at 0x1234567>

See also

Provider class: plask.flow.PotentialProvider2D

Receciver class: plask.flow.PotentialReceiver2D

Attribute Details¶

DriftDiffusion2D.FullIon = <property object>¶: True if dopants are completely ionized

DriftDiffusion2D.Pol = <property object>¶: True if polarization effects are taken into account

DriftDiffusion2D.Raug = <property object>¶: True if Auger recombination is taken into account

DriftDiffusion2D.Rrad = <property object>¶: True if radiative recombination is taken into account

DriftDiffusion2D.Rsrh = <property object>¶: True if SRH recombination is taken into account

DriftDiffusion2D.SchottkyN = <property object>¶: Schottky barrier for n-type contact

DriftDiffusion2D.SchottkyP = <property object>¶: Schottky barrier for p-type contact

DriftDiffusion2D.algorithm = <property object>¶: Chosen matrix factorization algorithm

DriftDiffusion2D.geometry = <property object>¶: Geometry provided to the solver

DriftDiffusion2D.id = <property object>¶

Id of the solver object. (read only)

Example

>>> mysolver.id
mysolver:category.type

DriftDiffusion2D.initialized = <property object>¶

True if the solver has been initialized. (read only)

Solvers usually get initialized at the beginning of the computations. You can clean the initialization state and free the memory by calling the invalidate() method.

DriftDiffusion2D.iterative = <property object>¶: Iterative matrix parameters (see IterativeParams)

DriftDiffusion2D.loopsFn = <property object>¶: Loops limit for the electrons quasi-Fermi level

DriftDiffusion2D.loopsFp = <property object>¶: Loops limit for the holes quasi-Fermi level

DriftDiffusion2D.loopsV = <property object>¶: Loops limit for the potential

DriftDiffusion2D.loopsV0 = <property object>¶: Loops limit for the built-in potential

DriftDiffusion2D.loopsVi = <property object>¶: Loops limit for the initial potential estimate

DriftDiffusion2D.maxerrFn = <property object>¶: Limit for the electrons quasi-Fermi level updates

DriftDiffusion2D.maxerrFp = <property object>¶: Limit for the holes quasi-Fermi level updates

DriftDiffusion2D.maxerrV = <property object>¶: Limit for the potential updates

DriftDiffusion2D.maxerrV0 = <property object>¶: Limit for the built-in potential updates

DriftDiffusion2D.maxerrVi = <property object>¶: Limit for the initial potential estimate updates

DriftDiffusion2D.mesh = <property object>¶: Mesh provided to the solver

DriftDiffusion2D.voltage_boundary = <property object>¶

Boundary conditions of the first kind (constant potential)

This field holds a list of boundary conditions for the solver. You may access and alter its elements a normal Python list. Each element is a special class that has two attributes:

`place`	Boundary condition location (`plask.mesh.RectangularBase2D.Boundary`).
`value`	Boundary condition value.

When you add new boundary condition, you may use two-argument append, or prepend methods, or three-argument insert method, where you separately specify the place and the value. See the below example for clarification.

Example

>>> solver.voltage_boundary.clear()
>>> solver.voltage_boundary.append(solver.mesh.Bottom(), some_value)
>>> solver.voltage_boundary[0].value = different_value
>>> solver.voltage_boundary.insert(0, solver.mesh.Top(), new_value)
>>> solver.voltage_boundary[1].value == different_value
True

PLaSK User Manual

PLaSK User Manual

Page Contents

DriftDiffusion2D Class¶

Methods¶

Attributes¶

Receivers¶

Providers¶

Other¶

Descriptions¶

Method Details¶

Receiver Details¶

Provider Details¶

Attribute Details¶

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PLaSK User Manual

Page Contents

DriftDiffusion2D Class¶

Methods¶

Attributes¶

Receivers¶

Providers¶

Other¶

Descriptions¶

Method Details¶

Receiver Details¶

Provider Details¶

Attribute Details¶