JV File
The JV file contains a table with the JV parameters. Followed by the JV scan itself.
Example data¶
Updated header structure
As of v2.4.0, the file headers are updated to include all available settings. The legacy version is still available by setting FileHeaderVersion = 1 in the configuration file.
Notes
[General Info]:Temperature is included only if a temperature sensor is configured.
[Environment Settings] shows the fixed Irradiance (mW/cm²) value instead if no environment is selected.
[Day-Night Settings] is only included if it is configured.
[Environment] shows the value of the associated sensors during the JV. It is only included if an environment is selected.
Below you can find several example header structures based on which settings are configured. The v1 (legacy) header is static and doesn't change based on the settings.
## Header ##
[General info]
User Cicci Research
Device Sample
Cell area (cm2) 1
Test Stability (JV)
Date 2026-02-24
Time 11:49:25
Note SMU 1A
[Channel Settings]
Voltage Range 10 V
Current Range 18 mA (L)
[Cell Settings]
Inverted No
Type Cell
Cell Area (cm2) 1
#Cells 1
[JV Settings]
Vmin (V) -0.1
Vmax (V) 0.7
Voltage Step (mV) 40
Scan Rate (mV/s) 200
Scan Direction FW then RV
Auto-detect Voc Yes
Overvoltage (%) 0
[Environment Settings]
Irradiance (mW/cm²) 100
## Data ##
Scan Voc Jsc V_MPP J_MPP P_MPP Rs R// FF Eff
V mA/cm² V mA/cm² mW/cm² Ohm Ohm % %
FW -1.230104 -3.021945 -0.655025 -1.666126 1.091354 2.94E+2 5.65E+2 29.36 11.73
RV 0.761543 1.087563 0.374948 0.521392 0.195495 7.84E+2 6.26E+2 23.60 2.10
V_FW (V) J_FW (mA/cm²) V_RV (V) J_RV (mA/cm²)
-3.187902E+0 7.089213E+0 6.761269E+0 -1.309565E+1
-6.326601E+0 1.234149E+1 8.817806E+0 -1.625949E+1
-8.570556E+0 1.588318E+1 9.645930E+0 -1.715583E+1
...
## Header ##
[General info]
User Cicci Research
Device Sample
Cell area (cm2) 1
Test Stability (JV)
Date 2026-02-24
Time 11:49:25
Temperature 355.01
Note SMU 1A
[Channel Settings]
Voltage Range 10 V
Current Range 18 mA (L)
[Cell Settings]
Inverted No
Type Cell
Cell Area (cm2) 1
#Cells 1
[JV Settings]
Vmin (V) -0.1
Vmax (V) 0.7
Voltage Step (mV) 40
Scan Rate (mV/s) 200
Scan Direction FW then RV
Auto-detect Voc Yes
Overvoltage (%) 0
[Environment Settings]
Name Light Soaker
Humidity Square4x6:Humidity
Temperature Square4x6:Temperature
Luminosity Pyranometer:lum
[Environment]
Irradiance (mW/cm²) 9.30
Temperature (°C) 355.01
Humidity (%) 225.08
## Data ##
Scan Voc Jsc V_MPP J_MPP P_MPP Rs R// FF Eff
V mA/cm² V mA/cm² mW/cm² Ohm Ohm % %
FW -1.230104 -3.021945 -0.655025 -1.666126 1.091354 2.94E+2 5.65E+2 29.36 11.73
RV 0.761543 1.087563 0.374948 0.521392 0.195495 7.84E+2 6.26E+2 23.60 2.10
V_FW (V) J_FW (mA/cm²) V_RV (V) J_RV (mA/cm²)
-3.187902E+0 7.089213E+0 6.761269E+0 -1.309565E+1
-6.326601E+0 1.234149E+1 8.817806E+0 -1.625949E+1
-8.570556E+0 1.588318E+1 9.645930E+0 -1.715583E+1
...
## Header ##
[General info]
User Cicci Research
Device Sample
Cell area (cm2) 1
Test Stability (JV)
Date 2026-02-24
Time 11:49:25
Temperature 355.01
Note SMU 1A
[Channel Settings]
Voltage Range 10 V
Current Range 18 mA (L)
[Cell Settings]
Inverted No
Type Cell
Cell Area (cm2) 1
#Cells 1
[JV Settings]
Vmin (V) -0.1
Vmax (V) 0.7
Voltage Step (mV) 40
Scan Rate (mV/s) 200
Scan Direction FW then RV
Auto-detect Voc Yes
Overvoltage (%) 0
[Environment Settings]
Name Light Soaker
Humidity Square4x6:Humidity
Temperature Square4x6:Temperature
Luminosity Pyranometer:lum
[Day-Night Settings]
Sensor lum
Unit mW/cm²
Threshold Value 5
Threshold Duration 0
Night Algorithm Fixed Voltage (no track)
Night JV Disable
Constant Output 0.2
[Environment]
Irradiance (mW/cm²) 9.30
Temperature (°C) 355.01
Humidity (%) 225.08
## Data ##
Scan Voc Jsc V_MPP J_MPP P_MPP Rs R// FF Eff
V mA/cm² V mA/cm² mW/cm² Ohm Ohm % %
FW -1.230104 -3.021945 -0.655025 -1.666126 1.091354 2.94E+2 5.65E+2 29.36 11.73
RV 0.761543 1.087563 0.374948 0.521392 0.195495 7.84E+2 6.26E+2 23.60 2.10
V_FW (V) J_FW (mA/cm²) V_RV (V) J_RV (mA/cm²)
-3.187902E+0 7.089213E+0 6.761269E+0 -1.309565E+1
-6.326601E+0 1.234149E+1 8.817806E+0 -1.625949E+1
-8.570556E+0 1.588318E+1 9.645930E+0 -1.715583E+1
...
## Header ##
[General info]
User Cicci Research
Device Silicon
Cell area (cm2) 1
Test Stability (JV)
Date 2026-01-13
Time 16:53:26
Note SMU 1D
[JV Settings]
Vmin (V) -0.100
Vmax (V) 0.700
Voltage Step (mV) 20.000
Scan Rate (mV/s) 100.000
Auto-detect Voc Yes
Scan direction FW then RV
Voltage Range (V) 10 V
Current Range (V) L
Inverted No
Auto-range On
[Cell Settings]
Tipology Cell
Cell Area (cm2) 1.00
#Cells 1.00
W cell area (cm2) 1.00
#W cells 1.00
## Data ##
Scan Voc Jsc V_MPP J_MPP P_MPP Rs R// FF Eff
V mA/cm² V mA/cm² mW/cm² Ohm Ohm % %
FW 0.458325 1.059331 0.364180 0.932366 0.339549 3.75E+1 6.20E+5 69.94 0.34
RV 0.458902 1.059199 0.357920 0.941816 0.337095 3.65E+1 8.73E+4 69.35 0.34
V_FW (V) J_FW (mA/cm²) V_RV (V) J_RV (mA/cm²)
-1.10653E-1 1.05974E+0 5.20086E-1 -4.66223E+0
-9.06952E-2 1.06152E+0 5.02734E-1 -2.51252E+0
-7.07408E-2 1.05924E+0 4.84707E-1 -1.11390E+0
-5.01796E-2 1.06117E+0 4.67572E-1 -2.65807E-1
-3.05984E-2 1.06002E+0 4.46978E-1 2.46510E-1
-1.06036E-2 1.05916E+0 4.27515E-1 5.44715E-1
1.03375E-2 1.05961E+0 4.07865E-1 7.32007E-1
2.93350E-2 1.05967E+0 3.87815E-1 8.44080E-1
4.88898E-2 1.05894E+0 3.67467E-1 9.14722E-1
6.97690E-2 1.05831E+0 3.49364E-1 9.62141E-1
...