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 Schr�dinger
equation the ballistic current is written out. The last column is the sum of
ballistic currents of all Schr�dinger 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 [cm�/Vs] |
Hole mobility [cm�/Vs] |
Electron diffusion constant [m�/s] |
Hole diffusion constant [m�/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 = (�el
n + �h 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/m�]
- 2D: [A/m]
- 3D: [A] | 