Solutions for solar cells in lab
h.a.l.m. offers ready-to-go high-end photovoltaic performance testers for lab use. The standard solutions cetisPV-Celltest3 and cetisPV-Moduletest3 include mechanical housings optimized for sun simulating. They are adaptable to many tasks. h.a.l.m. systems offer a wide scope of detailed analysis and measuring methods especially for the non-time-critical lab situation.
The cetisPV-Celltest3 is a complete class AAA rated high-precision manual tester system for the IV measurement of solar cells. It is designed for high R&D, laboratory, and start-up production use.
High precision measuring
The h.a.l.m. IV curve tracer cetisPV-CTL1 is a 3-channel 16-bit AD converter with an active electronic 3-quadrant load for synchronous measurement of current, voltage, and irradiance. Above that, it tracks different temperatures via RTD or contact-free IR sensors for temperature correction according to IEC 60891 Ed. 2.0.
Extendend flash performance
The high-speed sun simulator allows flash durations of up to 200 ms. h.a.l.m. offers unique features like single-flash hysteresis for capacitive cells and multi-level flashes, which allow to record IV curves at different intensities within one flash.
Flexible cell contacting
The contacting system cetisPV-Contact1 allows the user to accurately measure different cell layouts. With little hex key adaptions, the system can be switched from a two- to a three-busbar layout. The double IV contacting probes are easy to maintain. cetisPV-Contact1 can also be used in semi-automatic cell testers or in small production environments. Equipped with an optional pneumatic lift (two hand security push buttons), a complete handling cycle of loading, measuring, and unloading of a cell specimen can be performed within approximately 6 seconds.
Optimized dark chamber construction
The measurement dark chamber provides mounting facilities for the flasher light box and the cell-contacting station. The side walls and the front doors are coated with anti-reflective tissue. For easy handling, two light tubes illuminate the chamber only when the doors are opened. While closed, the operator is protected against the flash light and a proper dark measurement situation is provided. Since this type of measurement is extremely sensitive to residual light, true dark IV measurements including the evaluation of very stable RserDf and RshuntDf values can be carried out. The new chamber design incorporates mounting space for additional electro-optical measurement systems (optional): thermo-graphical camera for hotspot analysis and electroluminescence camera for micro-crack detection.
Advanced measuring and analysis methods
For lab use, h.a.l.m. devices allow further measuring methods like sectional measurement or double-flash hysteresis (or even the combination of both). The sectional measurement collects IV curve data over several flashes. Therefore, the total load sweep can be segmented over several flashes to reduce dynamical effects. Above that, two measurements (series) with inverted load sweep direction can be combined to reduce sweep directional influences.
Many hardware add-ons and retrofits available
Thanks to the modular principle, the h.a.l.m. systems in general can be easily extended and updated to the newest state-of-the-art. There are several hardware options available, which can be integrated and retrofitted. The cetisPV-GR (grid resistance), for example, analyses the cell surface printing quality and finger resistances on front and rear side. Additionally, it checks the contact resistance of the pins to ensure a good and reliable contact is made to the cell.
Visual inspection add-ons available
Also available for the cetisPV-Celltest3 are thermography and electroluminescence options, which are smoothly integrated into the system. This also allows the unique long-term thermography feature.