Solar Cell Spectral Response / Quantum Efficiency / IPCE Measurement Systems
PV Measurements, Inc. offers a range of solar cell quantum efficiency measurement systems for photovoltaic cell testing, customized to be the best system for your measurement needs. The systems are built on the platforms of the QEX10 and the QEW7 Spectral Response Measurement Systems.
External Quantum Efficiency
Solar Cell Spectral Response Measurement Systems give detailed data on how efficiently a solar cell converts light into current at various wavelengths. PV Measurements' systems normally provide the data in Quantum Efficiency (QE) units, also known as External Quantum Efficiency (EQE) and Incident Photon Conversion Efficiency (IPCE).
The detailed performance information provided by a QE measurement is commonly used by researchers to document and answer questions about:
- Device performance
- Material purity
- Material selection
- Device design
- Process steps
Internal Quantum Efficiency
Some of the light incident on a solar cell is reflected which reduces the amount of light entering the solar cell. If the power or irradiance of the reflected light is measured and subtracted from the known incident light quantity, the system knows how much light is entering the solar cell and can calculate Internal Quantum Efficiency (IQE). With the Reflectance Accessory, the QEX7 can measure the reflectance of a photovoltaic device and provide the solar cell IQE measurement.
Solar Cell Manufacturing Process Control
In manufacturing, regular sampling of the photovoltaic devices as they come out of the production line yields spectral response data that helps reveal which process steps need to be adjusted. Experienced operators can use the information to determine how processes need to be adjusted to maintain efficiency and quality.
Solar Cell QE Measurement System Models