Indiaphotonics was established in 2015 by a team of Electronics engineers and commerical people by bringing their expertise together in integrated advanced instrumentation, photonics, laser, spectrometer, and chemometric technologies producing spectroscopy and laser instrumentation
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Quantum Efficiency Measurement System also is known as Incident Photon to Converted Electron (IPCE) Measurement System.
The Quantum Efficiency Measurement System allows an overall "external" quantum value measurement, which is considered the most important factor in cell testing. Measurement capabilities also include the Spectral Response, and IV Testing. The Quantum Efficiency Measurement System can be upgraded to include Internal Quantum Efficiency measurements, Constant Photocurrent Method Measurements, Photo-thermal Deflection Spectroscopy Measurements, or Dual Beam Photocurrent Measurements.
This system includes either a 150W Xenon or 250W QTH lamp, and a monochromator to tune the light source. A source meter (Keithley 2400) used as an active load permits operating the test cell at various load conditions, including short-circuit, compensating for a series resistor required to sense the current produced by the modulated monochromatic light. This sensed current plus a reference signal at the frequency of the light modulation are both fed into the precision lock-in amplifier (Stanford SR-810) to allow measurement of the photocurrent generated by the modulated monochromatic light.
The Quantum Efficiency Measurement System features all the software required for I-V Curves and Spectral Response measurements. Main parameters of these measurements are displayed by the software, including the most important graphs typically required by researchers and the industry. For the industry, our software development group offers to develop whatever is required to meet demand.
The geometry of the light from the Monochromator is controlled to illuminate only a small section of the solar cell (typically 3mm diameter), ensuring that 100% of the monochromatic irradiance contributes to the output signal.
NOTE: Spot size must be smaller than the 5mm diameter reference detector.
The Quantum Efficiency Measurement System system includes a I-V-Test measurement system, precision lock-in amplifier and system software. The software controls the Monochromator, source meter and lock-in amplifier to automatically measure the I-V characteristics and SR versus wavelength, plotting the result(s) on screen and outputting calculated results, including Voc, Isc, Pmax, Fill Factor, plus the raw measurements to a standard file format.
Additionally, the Quantum Efficiency Measurement System can be upgraded with optional light tight sample chamber, vertical adjustment components, sliding sample holder, and thermal control (either cooling or heating) for the sample holder. While these additions are not required for operation of the system, including them will ease your operation of the system.
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