This is an entry level setup for photoelectrochemistry. It consists of a potentiostat, a LED revolver, a universal electrochemical cell and a set of electrodes: reference Ag/AgCl and platinum counter electrode.
The device is ready for two and three electrode measurements.
The LED revolver delivers irradiation from 1 of 10 LEDs in UV, VIS and NIR range. One can perform current measurements when potential and light intensity are scanned across set ranges.
A sample is placed in a PTFE electrochemical cell that handles both transparent and opaque substrates.
Although this is a simplified version of a full photoelectric spectrometer, it is rich in measurement possibilities.
Quantities measured by the instrument:
- Current as a function of set bias potential,
- Open Circuit Potential (OCP),
- I-V characteristics of a sample under illumination,
- Photocurrent at a large range of light intensities,
- IPCE or EQE at wavelengths present in the LED revolver,
- SPV (Surface Photovoltage),
- Space Charge Region capacitance if there is a super-bandgap, wavelength in LED revolver.
- Current ranges: 10 mA, 1 mA, 100 µA, 10 µA, 1 µA, 100 nA.
- Current resolution: 1 pA
- Potential ranges: -5 V do 5 V
- Default LED set [nm]: 365, 385, 405, 450, 520, 590, 630, 740, 840, white (see LED revolver for details)
- Typical LED power: 3 W
- Measurement techniques: chronoamperometry, voltammetry, cyclic voltammetry, and more
- Reference electrode: Ag/AgCl
- Counter electrode: Pt
- PTFE electrochemical cell for both types of samples: transparent and opaque substrates
- Computer connectivity: USB 2.0
PhotoelectricLED 12/11/2019
Zobacz