Large area device fabrication and quantification of degradation mechanisms
The increasing energy demand in the last decades pushed the research community to find alternatives to conventional energy sources, and perovskite solar cells (PSC) have emerged as a potential choice of materials owing to their high power conversion efficiency (PCE). The device performance is now at par with mature technology at the lab scale however, it lacks long-term stability, reproducibility, and scalability for mini-modules and modules. In the quest for stable and efficient halide perovskite, current efforts have been widely attracted by the use of formamidinium lead triiodide due to its lower optical band gap (1.47 eV) and through additivization stability, issues can be overcome. We aim to fabricate mini-modules (15x15cm2), with our developed materials and study their failure and degradation mechanisms.
Status: Ongoing
Date of proposal: 31/05/2023
Start date: 01/02/2023
End Date: 20/02/2023
Used Instruments: Automated blade coating tool. 15 ns pulsed UV laser system (355 nm) for laser patterning. Class A sun simulator for performance testing.
Experimental Technique: Blade coating of CsFAPbI3 perovskite layer. Laser patterning for cell segmentation. Photovoltaic performance testing.
Experiment Description: The project focused on fabricating and evaluating perovskite solar mini-modules (PSMs) using pre-synthesized CsFAPbI3 perovskite powder. The PSMs were fabricated with a structure of Glass/FTO/SnO2/CsFAPbI3/PEAI/Spiro-OMeTAD/Au, employing blade coating techniques under ambient atmosphere.
Type Samples: Perovskite solar mini-modules (PSMs).
Sample Description: Mini-modules with an active area of 12.5 cm2 composed of 5 sub-cells. Blade coated CsFAPbI3 large area film.
Experiment Data Type: Performance data of the PSMs, including efficiency, VOC, JSC, and FF.
Characterization Technics: Current density/voltage (J-V) measurements. Laser patterning for module segmentation. Performance analysis under simulated sunlight.
Characterization Data Type: Efficiency and performance parameters of PSMs. Characterization of the PSM structure and patterning.
Analyzed Data: Effectiveness of the blade coating technique for large area perovskite layer. Performance analysis of perovskite solar mini-modules under ambient conditions.
Main Targets Project: Fabrication of perovskite solar mini-modules using a pre-synthesized perovskite powder. Evaluation of the performance and efficiency of the PSMs.
Main Achievements Findings: Successfully fabricated blade coated large area perovskite layer and PSMs. Achieved an efficiency of 18.5% for the mini-module with a high VOC of 5.32 V, JSC of 23.12 mA cm?2, and FF of 75.18%. Observed negligible hysteresis in the PSMs, which could indicate improved operational stability. Further testing is planned for long-term operational stability of the encapsulated PSMs.
Review 13
How would you describe your experience with the VIPERLAB opportunity? How did the experience/visit at UNITOV meet your expectations?
My VIPERLAB opportunity was truly exceptional. The application process was smooth, and the program coordinators' communication was clear and helpful. During the visit to UNITOV (CHOSE - Roma, 00133, Italia), my expectations were not only met but also exceeded in every aspect. The ambient printing facility was state-of-the-art, and the research staff was incredibly welcoming and knowledgeable. Participating in hands-on experiments and interacting with cutting-edge technology was enriching and unforgettable.
Did you face any difficulties during your visit or application process?
The assistance provided was truly outstanding, and I encountered no difficulties throughout the entire process.
Does this VIPERLAB experience at UNITOV bring you closer to your research objectives? How?
Our objective was to upscale the perovskite solar cell from pre-synthesized powder perovskite via ambient printing tools. We were able to fabricate large area perovskite solar mini modules with the help of highly experienced researchers at CHOSE laboratory.
What other VIPERLAB activities have you participated in, or would you like to participate in?
Do you intend or already did publish/present your collected results in a paper or conference?
We achieved some great results from the stay, and the manuscript is currently being prepared.