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.
|Type of solar cell||:||Dye Sensitized Solar Cell, Mono/Multi crystalline Si Solar Cells, Perovskite semiconductor heterostructure etc.|
|Spectral wavelength||:||300 nm to 1100 nm|
|Measurement Parameters||:||Spectral response, External quantum efficiency, Internal quantum efficiency, Reflectance, Transmittance, IV Measurements|
|Mode of operation||:||Both AC and DC|
|Measurement / System Quality||:||Repeatability 99 %|
|Light Source||:||Dual 75W xenon / quartz halogen light (optional high and low frequency optical chopping)|
|Monochromator||:||Wavelength range of 300 nm - 1100 nm|
|Focal Length||:||250 mm|
|Wavelength Resolution||:||0.1 nm|
|Chopper||:||AC chopping 10Hz to minimum 400Hz|
|DC chopping||:||0 - 2 Hz|
|Bias Light||:||3W (optional)|
|Lock-in Amplifier||:||Input Range : 0 to 10V|
|Reference Input||:||0 - 5V|
|Gain Accuracy||:||± 1 %|
|Output Stability||:||500 ppm / °C depending on sensitivity|
|Time Constant||:||10ms to 10s|
|ADC Resolution||:||12 bit|
|Maximum acquisition speed||:||< 25 µs (signal)|
|Control Front panel / USB|
|Sample holder||:||Mounts with micro positioners, front / front, front / back, back / back contacts, (optional temperature control)|
|Sample size||:||2 inch|
|Contact Probe||:||2 Contact probes with micro positioners One reference solar cell with I-V and spectral response data.|
|PC and Software||:||The Measurement System should operate automatically under the control of a computer with an appropriate operating system|
|Platform Diameter||:||50 mm|
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