Output-current-data
The output of current, Fermi levels, mobilities and I-V characteristics is controlled
by this keyword.
!-------------------------------------------------------------------!
$output-current-data
optional !
destination-directory
character
required !
current
character
optional !
recombination
character
optional !
fermi-levels
character
optional !
mobility-out
character
optional !
IV-curve-out
character
optional !
$end_output-current-data
optional !
!-------------------------------------------------------------------!
Syntax:
destination-directory = my-directory/
e.g. = current/
Name of directory to which the files should be written. Must exist
and directory name has to include the slash (\
for DOS and / for UNIX)
current = yes /
no
Flag whether to put out current.
recombination = yes /
no
Flag whether to put out the generation and recombination rates (net
recombination, SRH = Shockley-Read-Hall, Auger, direct = radiative, total).
The units are [1018 cm-3s-1].
fermi-levels = yes /
no
Flag whether to put out the Fermi levels
mobility-out = yes /
no
Flag whether to put out the mobility, diffusion constant, drift velocity, and also the
conductivity.
IV-curve-out = yes[A/m^2] !
1D simulation: Output current density in units of [A/m^2].
= yes[A/cm^2]
! [A/cm^2].
= yes[A/m]
! 2D simulation: Output current density in
units of [A/m].
= yes[A/cm]
! 2D simulation: Output current density in
units of [A/cm].
= yes[A]
! 3D simulation: Output current density in
units of [A].
= yes
!
[A/m^2] (1D), [A/m] (2D), [A] (3D)
(default units)
=
no
!
Flag whether to put out the I-V characteristics (i.e. current density as a function of
applied voltage).
For ballistic calculations using the CBR method, for each Schrödinger
equation the ballistic current is written out. The last column is the sum of
ballistic currents of all Schrödinger equations.
Output
Filenames and structure
Current:
1D output
filename:
currentD_ind000.dat |
| |
_ind000 |
number of voltage step corresponding to
this output file (only if voltage sweep is turned on) |
structure:
distance: |
el: |
hl: |
total: |
0.000000E+00 |
0.000000E+00 |
0.000000E+00 |
0.000000E+00 |
| Position in space [nm] |
Electron current [A/m2] |
Hole current [A/m2] |
Total current Itot=Iel+Ihl [A/m2] |
2D output
current_el2D_x_ind001.fld / *.coord
/ *.dat
...
- el/hl is for electron/hole
current output
- x/y is for x- or
y-component of two-dimensional current vector in units of [A/cm2]
- ind001 is for 1st voltage sweep index
3D output
current_hl3D_y_ind004.fld / *.coord
/ *.dat
...
- el/hl is for electron/hole
current output
- x/y/z
is for x-, y- or z-component of three-dimensional current vector in
units of [A/cm2]
- ind004 is for 4th voltage sweep index
Fermi levels:
quasi-Fermi levels of electrons and holes [eV]
filename:
fermi1D_el_ind000.dat |
| |
_el
_hl |
|
indicates if Fermi level for
electrons (_el) or holes (_hl) is contained |
| |
|
_ind000 |
number of voltage step corresponding to
this output file (only if voltage sweep is turned on) |
structure:
distance: |
fermi_el: |
0.000000E+00 |
0.000000E+00 |
| Position in space [nm] |
Fermi level [eV] |
Drift velocity:
drift velocity of electrons and holes [cm/s]
filename:
drift_velocity_ind004.dat |
| |
_ind004 |
number of voltage step corresponding to
this output file (only if voltage sweep is turned on) |
structure:
position[nm] |
vd_n[cm/s] |
vd_p[cm/s] |
0.000000E+00 |
0.000000E+00 |
0.000000E+00 |
| Position in space [nm] |
Electron drift velocity [cm/s] |
Hole drift velocity [cm/s] |
Mobility:
mobility of electrons and holes in units of [cm2/Vs]
and diffusion constants in units of [m^2/s]
1D output
filename:
mobility1D_ind001.dat |
| |
_ind000 |
number of voltage step corresponding to
this output file (only if voltage sweep is turned on) |
structure:
position[nm] |
mu_n[cm^2/Vs] |
mu_p[cm^2/Vs] |
D_n[m^2/s] |
D_p[m^2/s] |
0.000000E+00 |
0.000000E+00 |
0.000000E+00 |
0.000000E+00 |
0.000000E+00 |
| Position in space [nm] |
Electron mobility [cm²/Vs] |
Hole mobility [cm²/Vs] |
Electron diffusion constant [m²/s] |
Hole diffusion constant [m²/s] |
2D output
mobility_el2D_x_ind001.fld / *.coord
/ *.dat
...
- el/hl is for electron/hole
mobility output
- x/y is for x- or
y-component of two-dimensional mobility in units of [cm2/Vs]
- ind001 is for 1st voltage sweep index
3D output
mobility_hl3D_y_ind004.fld / *.coord
/ *.dat
...
- el/hl is for electron/hole
mobility output
- x/y/z
is for x-, y- or z-component of three-dimensional mobility in units
of [cm2/Vs]
- ind004 is for 4th voltage sweep index
Conductivity
Total conductivity sigma, and conductivity of electrons sigmael and holes
sigmahl in units of [Ohm-1m-1]
sigma = sigmael + sigmahl = (µel
n + µh p) e
conductivity1D_ind001.dat
position[nm] sigma[Ohm^-1m^-1]
sigma_n[Ohm^-1m^-1] sigma_p[Ohm^-1m^-1]
Recombination
The recombination rate R is contained in this file:
recombination1D.dat
The recombination rate is divided in two parts, one for electrons (rec_el) and one for
holes (rec_hl) because of the following reason:
If one regards generation/recombination
processes together with quantum mechanical wave functions it is possible that the
electron is located elsewhere than the hole and therefore the spatial
distribution of the recombination/generation rates for electrons and holes is
different (still under examination!).
Depending on which recombination models are used, the recombination output is
the sum of direct
(radiative), Auger and
Shockley-Read-Hall
recombination, and generation, so it is a net
recombination.
(If it is negative, generation dominates.)
The recombination file contains the following columns:
position[nm] rec_el[10^18/(cm^3s)] rec_hl[10^18/(cm^3s)]
SRH[10^18/(cm^3s)] Auger[10^18/(cm^3s)] direct[10^18/(cm^3s)]
total[10^18/(cm^3s)] R-G[10^18/(cm^3s)]
total = SRH + Auger + direct
R-G = total recombination rate - generation rate
(a negative value means net generation)
A separate file will be printed out that contains the generation rate G only:
generation1D.dat
position[nm] G[10^18/(cm^3s)]
I-V characteristics:
The current-voltage characteristics (I-V characteristics) are contained in this file.
Filename:
IV_characteristics1D.dat (1D simulation)
IV_characteristics2D.dat
IV_characteristics3D.dat |
Structure:
| VOLT_CL001 |
VOLT_CL002 |
CUR_EL001 |
CUR_EL002 |
CUR_HL001 |
CUR_HL002 |
CUR_TOT001 |
CUR_TOT002 |
Voltage
cluster 1
[V] |
Voltage
cluster 2
[V] |
electron current
cluster 1
[A/m2] |
electron current
cluster 2
[A/m2] |
hole current
cluster 1
[A/m2] |
hole current
cluster 2
[A/m2] |
Total current
cluster 1
[A/m2] |
Total current
cluster 2
[A/m2] |
Units:
- 1D: [A/m²]
- 2D: [A/m]
- 3D: [A] | 