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Improved Control of Perovskite Thin Film Formation by Reactive Spin Coating and Real Time In-Situ Feedback

Title data

Biberger, Simon ; Spies, Maximilian ; Schötz, Konstantin ; Kahle, Frank-Julian ; Leupold, Nico ; Moos, Ralf ; Grüninger, Helen ; Köhler, Anna ; Panzer, Fabian:
Improved Control of Perovskite Thin Film Formation by Reactive Spin Coating and Real Time In-Situ Feedback.
2023
Event: 12th SolTech Conference 2023 , 03.-05.10.2023 , Würzburg, Germany.
(Conference item: Conference , Speech )

Abstract in another language

Highly efficient perovskite solar cells require a high-quality perovskite film, which is in most cases achieved through a solution-based solvent engineering spin coating approach. Here, crystallization is induced by dispensing an antisolvent onto the precursor solution film after a specific spinning time. Process parameters like spin speed and timing of antisolvent dispensing are usually developed empirically and vary between labs in order to obtain optimized films. To address this issue, we developed a closed-loop feedback system based on our multimodal optical in-situ spin coater system in combination with realtime analysis of the optical spectra duringspin coating. We optically monitor the precursor solution film thickness as the parameter of interest and induce crystallization as soon as it reaches a certain target level, by doing so, we obtain a constant film quality over a wide range of different spin speeds, without manually adapting the processing parameters. This demonstrates that this method is capable of counteracting the effects of uncontrolled parameters, like variation in solvent evaporation rate due to atmospheric changes, thus leading to reproducible film quality.

Further data

Item Type: Conference item (Speech)
Refereed: Yes
Institutions of the University: Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics II - Optoelectronics of Soft Matter
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics II - Optoelectronics of Soft Matter > Chair Experimental Physics II - Optoelectronics of Soft Matter - Univ.-Prof. Dr. Anna Köhler
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Functional Materials
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Profile Fields
Profile Fields > Advanced Fields
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions
Research Institutions > Central research institutes
Research Institutions > Central research institutes > Bayreuth Center for Material Science and Engineering - BayMAT
Research Institutions > Central research institutes > Nordbayerisches Zentrum für NMR-Spektroskopie - NMR-Zentrum
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 17 Jan 2024 08:45
Last Modified: 09 Feb 2024 09:37
URI: https://eref.uni-bayreuth.de/id/eprint/88252