Spectral Response / Quantum Efficiency / IPCE Measurement System

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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

Example QE measurements of single-junction solar cells

Example QE measurement of a triple-junction solar cell