Current-Voltage

IV Analysis

Convert I-V measurement files into graphs, then review Log I-V, Dark Semilog, and Resistance results in one workflow.

Open IV Analysis Tool

Supported formats

.txt, .log, .csv, .dat

Available analysis features

  • Log I-V

    Review absolute measured current on a log axis to compare leakage, rectification, and current span.

    Log I-V uses absolute measured current on a log axis; review polarity, current floor, and hidden negative values before interpreting leakage.

  • Dark Semilog

    Fit the forward dark-current semilog region and inspect ideality factor n, saturation current J0, and fit evidence.

    Dark Semilog fit results depend on forward-bias range selection and dark-current quality; review R2 and fit window before reporting n or J0.

  • Resistance

    Use differential-resistance and selected fit windows to review Rsh, Rs, and 1-Diode estimates.

    Resistance estimates depend on selected fit windows and differential-current behavior; compare Rsh and Rs with the source I-V curve before reporting.

What this tool can review

  • I-V curve visualization

    Load current-voltage measurements and review voltage-current-density curves with detected measurement-mode context.

  • Log I-V

    Plot measured voltage against absolute measured current on a log axis for leakage, rectification, and current-span review.

  • Dark Semilog

    Fit the selected forward dark-current region and review ideality factor n, saturation current J0, and fit evidence.

  • Resistance

    Review differential-resistance behavior and compare Rsh, Rs, and 1-Diode estimates through selected fit windows.

Typical use cases

  • Review light and dark I-V source curves before comparing calculated metrics.
  • Inspect absolute measured-current behavior on a logarithmic current axis.
  • Fit forward dark-current regions and review diode-fit outputs with fit evidence.
  • Compare shunt resistance, series resistance, and selectable 1-Diode estimates.

FAQ

What happens after I drop an I-V file?

The measurement file is converted into a current-voltage graph. From there, the workspace helps you review Log I-V, Dark Semilog fitting, and Resistance results.

What can I inspect for light I-V files?

When light-curve inputs support it, the workspace summarizes values such as Voc, Jsc, FF, PCE, and maximum-power-point related results alongside the source curve.

How are my measurement files handled?

Files uploaded to this analysis tool are processed in the current browser session for graph conversion and analysis. The tool does not send files outside or save them without user permission.

Supported workflow

  • Graph Conversion turns I-V measurement files into current-voltage views for source-curve review.
  • Log I-V uses absolute measured current to compare leakage, rectification, and current dynamic range.
  • Dark Semilog fits the selected forward dark-current region to review n, J0, and fit evidence.
  • Resistance reviews differential resistance and selected Rsh, Rs, or 1-Diode fit-window results.