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Mini photoelectric spectrometer Excellent for basic sample characterization

Photocurrent and OCP measurements under illumination from LED revolver.

description

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.
Click the photo to enlarge

specifications

  • 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
exemplary results

I-V characteristics

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OCP versus light intensity

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3D map of I-V curves for different light intensities

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Software
PhotoelectricLED 12/11/2019 Zobacz
ACCESSORIES The following accessories are compatible with the product
Dummy cell
LED revolver
Light calibrator
Platinum electrode
Potentiostat
Silver chloride reference electrode
Sample chamber
Universal cuvette
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