The spectral responsivity or quantum efficiency (QE) is essential for understanding current generation, recombination, and diffusion mechanisms in photovoltaic devices. PV cell and module calibrations often require a spectral correction factor that uses the QE. The quantum efficiency in units of electron - hole pairs collected per incident photon is computed from the measured spectral response in units of amperes per watt as a function of wavelength.
Model HO-SC-QEIV is integrated with 300W Xenon lamp with housing, optics, power supply and an easy to use software with capability to measure dark and lighted IV characteristics of solar cell and quantum efficiency measurement (300nm-1600nm).
System includes a sample stage, capable of accommodating samples up to 50 mm diameter and probes to contact the sample. Light is normally incident on the sample. Fixed frequency chopper and lock in amplifier are used for modulating the light at a frequency of 400Hz for measuring spectral response. Wavelength resolution of monochromator is 0.1nm. Illumination area can be adjusted using lens assembly system.
It can also be used for characterization / measurement of the imaging systems (cameras) and other detectors in terms of linearity range, spatial non-uniformity of response (the variation of responsivity across the active area of a detector) etc. Detector characterization allows identification of the detector with the best performance for a particular application.
|Wavelength Range||:||400 nm - 1200 nm|
|Wavelength Resolution||:||0.1 nm|
|Light source||:||300W Xenon arc lamp|
|Chopper frequency||:||400 Hz|
|Bias light||:||3W high bright LED|
|Maximum beam / Sample diameter||:||50 mm|
|Voltage range||:||1 to -1 V|
|Current range||:||0.1 uA to 0.75 A|
Measurement of the spectral response and quantum efficiency of a solar cell from 300 nm to 1600nm
Measurement of dark and lighted IV characteristics of a solar cell using a four quadrant power supply
300 W Xenon Lamp with integrated power supply
300 F Quasar Monochromator (300 - 1600 nm) with order sorting filters.
Flip mirror for the selection of measurement mode (Quantum efficiency or IV)
50mm beam diameter for lighted IV measurement
Sample holder with manual X-Y positioning system to align the position of the light beam on the sample
Sample size up to 50 mm
Built-in optical chopper and lock in amplifier.
LED bias light