Spectral Response / Quantum Efficiency / IPCE Measurement System

r

---

r r

r

Spectral Response / Quantum Efficiency / IPCE Measurement Systems

r r

These systems can measure a wide variety of photovoltaic devices, including p-n junction and dye-nanocrystalline solar cells (DSSCs).

r r

r

r r

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.

r r

Basic System Features

r r

??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

r r

Options

r r

??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

r r

r

r r

Example QE measurements of single-junction solar cells

r r

r

r r

Example QE measurement of a triple-junction solar cell