Products

Optical Characterization Tools

Quantum Efficiency (QE) measurements provide a primary characterization method for completed photovoltaic devices. ProtoFlex’s QE measurement system provides electronics and software designed for fully automated measurement of external quantum efficiency of solar cells. All systems include probes and a fixed plate sample stage for samples up to 150 mm x 150 mm. The main system components include custom designed software, measurement electronics, and computer system.

Standard Features

Compact electronics/hardware
Two light sources, a halogen lamp and a Xenon lamp
1/8-meter direct drive monochromator
Dual beam for intensity monitoring
Chopped monochromatic lock-in amplifier measurements
Automatic order sorting filters
Two calibrated reference detectors
Measurement accuracy ±2%
Computed Jsc vs AM1.5 global spectra

Models

QEBASE, 300 -1100 nm
QEFLEX, 300 – 1800 nm

Options

Filtered light bias
Voltage bias
Vacuum sample stage
Internal QE
Temperature stage

Sample Stages
ProtoFlex Measurement Stages can handle superstate, substrate and flexible type solar cells and are designed to accommodate PV devices having contact pads on the top, and devices with contact pads on the bottom. We offer sample stages for devices up to 150 mm X 150 mm in size. All stages come with a light tight enclosure option for dark measurements.

Calibrated Detectors & Solar Cells
Protoflex sells NIST traceable third-party calibrated detectors for reference. Detectors will include a silicon photodiode, calibrated from 250-1100 nm, a germanium photodiode, calibrated from 800-1800 nm and interface cables to connect detectors to the QE system. We also provide solar cell standards of various materials.