2026-10-29

IPCE Test Principle and Operation: How to Measure Spectral Photoelectric Conversion Efficiency Accurately | Perfectlight

1. What Is IPCE

IPCE(λ) = 1240 × J_ph / (λ × P_in), where J_ph is the photocurrent density, P_in is the incident light-power density, and λ is the wavelength. It measures "how many electrons each incident photon can produce," directly reflecting the material's spectral utilization.

2. Test Workflow

Use a monochromator or wavelength-tunable light source to output monochromatic light;
At each wavelength point, calibrate incident light intensity with the PL-MW2000 High-Intensity Light Power Meter;
Record the corresponding photocurrent and calculate IPCE point by point using the formula.

3. Common Error Sources

Light intensity not calibrated at each wavelength point: extrapolating from a single point severely distorts results;
Stray light and baseline not subtracted: inflate or suppress IPCE;
Edge leakage of the electrode: requires proper light shielding and encapsulation.

4. Apparatus Configuration

The Photoelectrochemical IPCE Test System integrates a monochromatic light source, light power meter, and potentiostat; paired with the PEC2000 Photoelectrochemical Test System, it completes full-spectrum IPCE scanning.

Free consultation: Always challenged by reviewers on IPCE light intensity? Perfectlight's Photoelectrochemical IPCE Test System calibrates wavelength by wavelength, making your curve directly publishable.

Tel: 400-1161-365 / 010-62128921　Perfectlight Official Website

Frequently Asked Questions (FAQ)

What is the IPCE formula?

IPCE(λ) = 1240 × J_ph / (λ × P_in), with J_ph the photocurrent density, P_in the incident light-power density, and λ the wavelength.

What are the common errors?

Not calibrating light at every wavelength, unsubtracted stray light/baseline, and electrode edge leakage.

How is the apparatus configured?

Integrate a monochromatic source, power meter, and potentiostat; pair with the PEC2000 for full-spectrum IPCE scans.

This article does not constitute a performance commitment; specific technical parameters are subject to the actual product documentation and mutual confirmation.

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