The King Abdullah University of Science and Technology and the Fraunhofer Institute for Solar Energy Systems report the production of Perovskiet-Silicon Tandem solar cells with open circuit tensions of more than 1.9 V as the result of a two-step hybrid trial for perovo-skiet film.
Researchers from King Abdullah University of Science and Technology (Kaust) in Saudi Arabia and Fraunhofer Institute for Solar Energy Systems (Fraunhofer Isee) have manufactured PEROVSKITE-SILICON Tandem Solar Cells with an open-circuit tensioning of V and 27.8% Power-Power The Evaporated/Blade. Perovskite on the Silicon Sub cell.
The development is one of the results of a collaboration between 18 months between Fraunhofer Ise and Kaust. ‘It is the highlight of combining the extensive expertise of Fraunhofer Isee in the hybrid evaporation/wetchemical method with Kaust’s experience in scaling up perovskiet deposit through mescoating‘The main author of the investigation told, Er-Raji said PV -Magazine.
In the newspaper “Coating Dynamics in two-steps Hybrid evaporated/MES-Coate perovskites for scalable fully structured perovskiet/silicon tandem solar cells“Published in Ees Solar, The research team outlined a laboratory method based on hybrid evaporation/spin-coating with a new two-step hybrid evaporation/MES-Coating-approach on thin films, single junction and perovskite-silicium tandem solar cells, including the influence of flooding of the experimental results with theoretic results with theoretic results with theoretical results with theoretic results with theoretical results with theoretical results with theoretical results with theoretical results with theoretic results The Blade coating process.
“By combining experimental results with theoretical considerations about the formation of the meniscus, we analyze the influence of liquid mechanisms that are involved in the mescoating process completely and we believe that the final perovskiet film properties can be controlled by two main properties: wet film thickness and the evaporation speed.
The lessons about the dynamics during Mescoating can ultimately be transferred by the researchers to the scalable final DIE coating process, according to Juliane Borchert, leader of the perovskiet materials and interface group at Fraunhofer Isee in a statement.
“A key run of this work was the identification of a direct correlation between the mess speed and the perovskiet conversion rate-a crucial parameter in the hybrid method that quantifies the transformation of evaporated inorganic material in the perovskiet-photoactive phase,” said Er-Raji.
“Our observations revealed that if the coating speed was lower than the evaporation of solvents, rapid evaporation of solvents endangered the conversion process. Conversely, in the Landau-Levich regime, the preservation of a wet film complete infiltration of organic precursors,” added, “added.” The Landau-Levich comparison is widely used in solar research to predict the thickness of wet layers that are deposited on substrates by DIP coating
The group said it was also able to transfer the use of crystallization additives to the hybrid evaporation/knife coating process to improve the grain size it had previously demonstrated without adjustments in concentration or glowing recipe, according to ER-RAJI.
The process reportedly made a “solution volume possible that was eight times lower than that was used in the hybrid evaporation/spin coating method.”
“Finally, we performed the first outdoor stability test for a tandem solar cell using scalable perovskiet film manufacturing on silicon floor cells with industrial-relevant texture.
Eer-Raj looked ahead to future research in these lines and said: “Now that we have gained a deeper insight from coating dynamics, we will use these insights to refine the composition of the perovskite, aimed at improving the operational stability of our devices.” Further work is planned for interface Passivation to minimize induced non-radiation recimination by defect and to expand stability, as well as scalable wet-chemical approaches, printing ink-jet and spray coating processes.
The research team also included researchers from the University of Freiburg,
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