QEW7 Solar Cell Spectral Response / QE / IPCE Measurement System

A tungsten filament light source, monochromator, filters, and reflective optics provide monochromatic light to a photovoltaic device while a broadband bias light illuminates the test device to simulate end-use conditions. The monochromator, filter wheel, and digital signal processing equipment are controlled by a computer, which also interprets signals, maintains calibration information, saves test data, and produces test reports. This system can measure a wide variety of photovoltaic devices, including p-n junction and dye-nanocrystalline solar cells.

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
• Simultaneous measurement of device response and light intensity
• Computer system with easy-to-use graphical user interface
• Monochromatic light spectral bandwidth approximately 5 nm (user-changeable) ‏ 360-1100 nm wavelength range
• Selectable wavelength interval (default 5 nm)
• Calculates Jsc estimate using reference spectrum
• Voltage bias capability
• White bias light source
• Chopping speed 4-200 Hz
• Measures silicon solar cell in 4-10 minutes Instruction manual
• Customer training in Colorado

Options

• Setup and training at customer's site
• Test fixture and contacting mechanism for your devices
• Temperature control for the optional test fixture
• Multi-junction cell measurement capability
• Other options are available; please contact us to discuss your requirements