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PV Measurements, Inc.
Instrumentation for photovoltaics industry and research

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Spectral Response / Quantum Efficiency / IPCE Measurement Systems
These systems can measure a wide variety of photovoltaic devices, including p-n junction and dye-nanocrystalline solar cells (DSSCs).


All systems include a light source, monochromator, filters, and reflective optics to provide monochromatic light to a photovoltaic device while a broadband bias light illuminates the test device to simulate end-use conditions. A computer interfaces with the monochromator, signal conditioning equipment, and digital signal processing equipment; interprets signals; maintains calibration information; saves test data; and produces test reports. Different models include different features and can be configured with different options.
Basic System Features
  • Dual grating monochromator with computer control
  • Filter wheel with order-sorting and stray light attenuation filters
  • Calibrated reference photodiode
  • Line filter for wavelength calibration verification
  • White bias light source
  • Simultaneous measurement of device response and light intensity
  • Easy-to-use graphical user interface
  • Computer, LCD monitor, keyboard, and color printer
  • 300-1100 nm (Model QEX7) or 360-1100 nm (Model QEW7) wavelength range
  • Monochromatic light spectral bandwidth approximately 5 nm (user changeable)
  • Selectable wavelength interval (default 5 nm)
  • Calculates Jsc estimate using reference spectrum
  • Instruction manual
Options
  • Setup and training at customer site
  • Reflectance and IQE measurement capability (Model QEX7)
  • 1100-1400 nm or 1100-1700 nm wavelength range extension
  • DC Measurement Mode Capability
  • Test fixture and contacting mechanism designed to meet your requirements
  • Temperature control for the test fixture
  • Multi-junction device measurement capability
Other options are available; please contact us to discuss your requirements.

Example QE measurements of single-junction solar cells


Example QE measurement of a triple-junction solar cell
Individual systems may vary in appearance,components, and features.