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IMPS/IMVS Intensity-Modulated Photocurrent/Photovoltage Spectroscopy System
Specifically designed for measuring time-scale parameters such as carrier transit time and recombination rate, this system provides
high-precision time-resolved measurements for in-depth analysis of key processes in photoelectric effects. It supports research in
electrochemistry, photoelectric materials, and optoelectronic devices, enabling accurate characterization of carrier behavior.
The system is particularly well-suited for dynamic performance studies of photoelectric materials and photocatalytic processes.
The IMPS/IMVS Intensity-Modulated Photocurrent/Photovoltage Spectroscopy System serves as a complement to static
photocurrent/photovoltage measurement instruments such as photoelectronic spectrometers or mini photoelectrochemical (PEC)
measurement systems.
"Intensity-modulated photocurrent/photovoltage spectroscopy is a method that reveals the following sample properties:"
· Minority carrier lifetime (recombination time)
· Carrier transit time through the sample
· Diffusion coefficient
· Diffusion length (if the sample thickness is known)
· Sample thickness (if the sample diffusion length is known)
· Charge transfer rate across interfaces
· And more kinetic quantities
"Technical Specifications"
· Modulation frequency range: 1 µHz – 10 kHz
· Number of LED wavelengths: 10
· Current range: 1 pA – 10 mA
· Potential range: -5 V to 5 V
"Demonstration Results" The figure shows the measurement results of nanocrystalline anatase on ITO foil in KNO₃ electrolyte,
provided by Professor J. Kuncewicz of Jagiellonian University.
Figure 1. Photocurrent spectrum.
Figure 2. Amplitude of higher harmonics.
Figure 3. Nyquist plot.
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