The Helmholtz Innovation Lab HySPRINT provides a unique infrastructure with the purpose to test and age perovskite solar cells (PSC) for the improvement of device stability under realistic ageing conditions at high device numbers allowing high throughput as well as a high level of statistical confidence. The lab is equipped for long term measurements and ageing of single-junction PSC and monolithic tandem solar cells (e.g. PSK/Silicon and PSK/CIGS) under realistic conditions.
Solar cells in power plants are operated at their Maximum Power Point (MPP), and it was found that the stability of PSC is strongly dependent on the electric load applied while the ageing test is performed. Thus, only MPP-Tracking will give realistic predictions of cell lifetime. Our High-Throughput Aging-System is equipped with electronics that allow us to MPP-track more than 380 solar cells in parallel. Testing is performed under AM1.5G light with 1 sun intensity. The sample environment can be set to nitrogen, other gases, or air. The substrate temperature is permanently controlled (constant or cycling) between -10-85°C. Sequential JV scans can be performed to gain further insights into device behavior. Automated dark-light cycles can be performed. Voc, Jsc and constant voltage ageing is also possible.
The Tandem Ageing-System is equipped with electronics that allow us to track 4 tandem solar cells in parallel. As the performance of monolithic tandem solar cells is strongly dependent on the utilized spectrum, an array of 193 LEDs with two different peak wavelengths was engineered. The 470 nm and 940 nm centre emission wavelengths are absorbed in the top- and bottom cell, respectively. Both intensities can be tuned independently to adjust the desired photocurrents of the subcells. With this, we can artificially induce a mismatch between the subcells in a controlled way. The cells are measured in ambient conditions with a controlled temperature of 25°C
Investigation of encapsulation layers for tandem solar cells
At HySPRINT – Stability Lab, a minimum quantity of 450 access days (on the basis of unit costs) will be provided, giving access to ca. 30 users (assuming an average of 15 days per experiment). Due to the fact that the stability tests are long-term experiments (15 days), the number of days when the users need to be present at the infrastructure can be reduced to 3 days. This is justified since the users do not have to be present throughout the whole runtime of the experiment
Quality of scientific environment: The HySPRINT innovation lab of HZB is part of the Berlin-Adlershof science campus. Users will benefit from (i) the unique world-class infrastructure of the HySPRINT Lab, (ii) the on-site availability of almost all methods of materials diagnostics and materials testing enabling a complete on demand characterization of the processed materials as required, (iii) the networking opportunities with world-class researchers and visiting scientists from a large number of members of the Adlershof science campus, including institutes, universities and high-tech companies, and (iv) the readily available on-campus accommodation that many thousands of visiting researchers take advantage of every year.
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