LITOS LITE
Parallel JV and Stability Measurement Platform for Solar Cells
Advantages - Specifications - Sample Holder - Illumination - Software - Publications - Download Brochure
Overview
Litos Lite is a platform to perform parallel JV and stability measurements on organic, perovskite solar cells and perovskite/silicon tandem solar cells. This innovative characterization hardware can perform JV measurements on up to 56 parallel channels (16 for tandems) and stress the solar cells with either constant voltage or current. Individual MPP tracking is possible on each of the devices under stress. The temperature of the samples can be controlled to a maximum value of 85 °C.
Litos Lite is suitable for device stressing according to the ISOS protocols.
Litos Lite Review
“5 star recommendation for LITOS LITE and FLUXIM support. A great choice for my lab, for setting up a nicely working system for monitoring stability under different conditions of our perovskite solar cells! Great communication with FLUXIM for installation, training and support! Highly recommended!”
Prof. Giulia Grancini
Director of ERC HYNANO project and pvsquared2 team and University of Pavia, Italy
Advantages
High-throughput JV and stability & lifetime measurements. Compatible with the ISOS protocols. MPP tracking routines.
Up to 56 independent channels for parallel measurements and stressing of multiple solar cells. Versions with 24, 32, 40 and 48, channels are also available.
NEW: Measure up to 16 Perovskite/Silicon Tandem Solar Cells in parallel.
Maximum current = 50 mA. Voltage range = +/- 10V.
Custom-made sample holder to be easily mounted under your solar simulator.
Samples are placed inside a sealed for a Nitrogen-rich atmosphere sample holder and illuminated from the top with a solar simulator or an LED array.
The sample holder is equipped with a heater.
The PID controller allows the stabilization of the temperature up to 85 °C.A solar simulator is available as an option. The solar simulators from Wavelabs can be controlled by the Litos Lite software.
Professional, user-friendly software for measurement automation. Automatic cycling between JV and stressing conditions. Sweep any measurement parameter: light-intensity, temperature, JV scan rate, …
“Highly recommended. We have one in our labs and we are saving hours of work by measuring many samples at one time. No time to build our setup up so this was a great purchase!”
Prof Dr. Juan-Pablo Correa-Baena
Georgia Institute of Technology
Specifications
| Litos Lite Specifications | |
|---|---|
| Best For | High-throughput, high-precision JV & stressing of perovskite solar cells |
| Functionality | Parallel JV, Stressing at MPP, constant-V, constant-J |
| Operation | Specify measurement conditions on each pixel. |
| No. of Channels | 24, 32, 40, 48, 56 |
| Sample Holder | Single chamber. Custom-made. Can be set up in a glovebox. |
| Sample Geometry | Customised to your device layout and amount of samples. Max thickness up to 4mm. |
| Voltage Range | ± 10V |
| Max Current/Channel | 50 mA. Up to 50 x 56 = 2.8 A |
| Current Resolution | Best/typical: 1 μA / 5 μA |
| Illumination | External. Compatible with Wavelabs Sinus 70/220/230 Solar Simulators, or custom illumination, e.g LED array. |
| Temperature Range | Min = 25°C. Max = 85 °C |
| Tandem Compatibility | Up to 16 Perovskite/Silicon Tandem Solar Cells |
Request a DEMO of LITOS LITE
Sample Holders
We customize each sample holder to the customer sample layout and the number of measurement channels chosen. We can also provide several sample holders for different sample layouts, or we can provide a flexible sample stage for up to 8 devices, which can be used with any device layout. The switching between different layouts is effortless. Simply clip-in another sample holder and enable it in the software.
We made every effort to make sure that loading the sample holder is as easy as possible. With each sample holder, we supply an “alignment guide”, which keeps the samples in position. All the user has to do is to loads their samples, optionally put masks over them, and snap a magnetic cover to fix the samples in place. Spring legs ensure good contact.
Each sample holder features a gas inlet and an outlet and can be sealed off with a quartz window for a nitrogen-rich atmosphere. This allows one to flush the sample holder with a gas of choice. The sample holder can be also loaded inside a glovebox, and then measured outside. Each sample holder houses an environmental sensor to measure temperature and humidity. The temperature is tracked in real-time.
Each sample holder can be equipped with a resistive heater. The heater is controlled with a PID. The temperature is stable within 1 °C up to 85 °C. The feedback is provided by the Pt100 sensor which is soldered to the resistive heater.
Measuring Tandem Perovskite/Silicon Solar Cells with Litos Lite
Litos Lite now supports the measurement and stability testing of tandem Perovskite/Silicon solar cells. This new capability allows researchers to conduct high-throughput, parallel testing of Perovskite/Silicon tandem solar cells, ensuring precise and consistent data collection.
Key benefits include:
✅ Stress up to 16 Perovskite/Silicon solar cells in parallel
✅ Customized layouts tailored to your research needs
✅ Stress each cell at individual bias condition or MPP
✅ Seamless integration with our user-friendly software
This new sample holder is now available for immediate order to all existing Litos Lite customers. If you’re considering a complete Litos Lite package, we’d love to discuss your research needs and explore how Litos Lite can be tailored to support your work.
Get a Quote for Litos Lite and the new Tandem Sample Holder Here
Example Custom Made Sample Holders
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Custom sample holder for 4 x 1cm x 1cm samples each containing 8 cells.
Tandem Perovskite/Silicon Sample Holder containing the maximum 16 samples
Sample Heating stage to ensure Homogeneous heat.
The electrical connections to the sample are designed according to the customer requirements.
Manual probes to contact the single pixel and perform quick JV characterizations are also available.
Illumination - Solar Simulator or LED Array
Litos Lite is designed to work with different illumination sources. Fluxim can provide a ready-to-go solution with one of our chosen light sources. We can also integrate other solar simulators into the system (as a custom-made solution).
For efficiency measurements, the result can only be as good as the light source used. We teamed up with Wavelabs to integrate different solar simulators into our PV stability setup.
The Sinus 70 (5x5 cm2, A++AA+) and the Sinus 220 (16x16 cm2, A++A+A+) are state-of-the-art LED solar simulators. They can be controlled directly via the Litos Lite software. The user can easily tune both the light intensity and the spectrum. A PID controller is stabilizing the output of the solar simulator to assure that the aging experiments are not affected by the variation of the illumination.
These LED solar simulators can maintain a constant emission spectrum at a constant level over time by self-adjusting the output with an integrated photodiode and spectrometer. This is a major advantage over standard Xenon lamp simulators when you need to perform a stability analysis: the output of the solar simulator does not degrade during the experiment.
Moreover, the different LEDs can be controlled independently to define light outputs that are specific to selected experiments. The spectrum can be adapted to different standards (AM 1.5G or AM 0) automatically, without using an external filter.
We can also offer a simpler AAA, 16x16 cm2 solar simulator from Wavelabs called the Sinus 230.
The solution solution is an ideal light soaking setup that can provide reliable stability measurements on your perovskite and organic solar cells.
Software for Parallel JV and Stability Measurements
Litos Lite has professional, user-friendly software. This is one of the biggest assets of the instrument.
First, the user chooses their sample layout, sets device area, polarity, voltage, and current safety limits for each pixel, and can assign each pixel a tag (e.g. dead), which can then be used to select/deselect devices to measure. It is possible to save those for future use.
Switch between different sample layouts, construct recipes with multiple steps, and acquire data.
Analyze the results live within the software while stressing the different pixels.
Full control over the Wavelabs SINUS beyond AAA solar simulators. Other simulators can be integrated upon request.
Once this is complete, the user can choose from one of the default measurement recipes, or design their own. Here, it is possible to program JV measurements, perform Maximum Power Point tracking, keep devices at constant current or voltage, change illumination, and control sample temperature. It is also possible to loop measurements or wait for specific conditions to be fulfilled (e.g. time elapsed or temperature reached). Finally, the user can sweep parameters such as light intensity, temperature, or scan speed (e.g. measure a series of JV curves at different temperatures). Even multi-dimensional sweeps are possible.
Once the user starts the measurement, a dedicated window with a live view appears, where the progress of the measurement can be tracked. Simultaneously, the results are channeled to the main GUI, where data can be analyzed.
In this window, various parameters such as PCE, Jsc, Voc, FF, and hysteresis are automatically extracted for JV curves. Parameters are also extracted for techniques such as MPP tracking, constant voltage, and constant current. Alongside, the readings from all sensors are saved including temperature, light intensity, and light spectrum (for certain supported solar simulators).
In the results section the data can be plotted in various ways: logarithmic axes, per pixel area, or absolute or absolute/relative time. It is possible to plot devices side-by-side and compare them.
Once the user is ready, they can export the data to CSV format for plotting or further analysis. Naturally, the data can also be saved and loaded.
Finally, in the hardware manager, the user can take direct control of the hardware and read all sensors. For example, one can turn on/off the heater or solar simulator, as well as set the intensity of backlight illumination.
