Mini Photoelectric Spectrometer setup allows to apply various measurement techniques: chronoamperometry, voltammetry, cyclic voltammetry and the light intensity modulated photocurrent/photovoltage. Those techniques enables to examine the photoelectric dynamics of the sample. Samples may be investigated using two- or three-electrodes configuration.
Quantities measured by the instrument:
- I-V characteristics of a sample under illumination,
- Open Circuit Potential (OCP) as a function of light wavelength,
- Photocurrent as a function of light intensity,
- IPCE or EQE at wavelengths provided by the LED Revolver,
- Surface Photovoltage (SPV),
- Space Charge Region capacitance if a super-bandgap wavelength LED is present in the LED Revolver.
Measurement techniques:
- Chronoamperometry,
- Voltammetry,
- Cyclic voltammetry,
- Chopped illuminance and more.
LED Revolver
- 10 LED slots,
- Default LED set: 365 nm, 385 nm, 405 nm, 450 nm, 520 nm, 590 nm, 630 nm, 740 nm, 840 nm, white (3000 K),
- Custom LED selection available,
- Typical electric power of LEDs: 3W,
- Light intensity modulation: square, sinusoidal, triangle or ramp waveform with adjustable amplitude and bias light intensity,
- Light modulation frequency range: 1 µHz ÷ 10 kHz,
Potentiostat
- Bias potential range: -5 V ÷ 5 V,
- Current ranges: 10 nA, 100 nA, 1 µA, 10 µA, 100 µA, 1 mA, 10 mA,
- Current resolution: from 1 pA to 100 nA (range dependent),
Controller
- Maximum sampling rate: 1 kSample/s,
- Connection with PC: via USB 2.0,
Electrochemical cuvette
- Adapted for transparent and opaque samples,
- Sample may be illuminated through the electrolyte or through the rear optical window,
- PTFE container for electrolyte,
- Reference electrode: Ag/AgCl,
- Counter electrode: Pt.
The instrument may be extended with the Sample Chamber to screen the ambient light and electromagnetic fields.
FotoGUI
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