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Drying Dynamics of Solution‐Processed Perovskite Thin‐Film Photovoltaics: In Situ Characterization, Modeling, and Process Control

Ternes, Simon; Börnhorst, Tobias; Schwenzer, Jonas A.; Hossain, Ihteaz M.; Abzieher, Tobias; Mehlmann, Waldemar; Lemmer, Uli; Scharfer, Philip; Schabel, Wilhelm; Richards, Bryce S.; Paetzold, Ulrich W.

Abstract:
A key challenge for the commercialization of perovskite photovoltaics is the transfer of high‐quality spin coated perovskite thin‐films toward applying industry‐scale thin‐film deposition techniques, such as slot‐die coating, spray coating, screen printing, or inkjet printing. Due to the complexity of the formation of polycrystalline perovskite thin‐films from the precursor solution, efficient strategies for process transfer require advancing the understanding of the involved dynamic processes. This work investigates the fundamental interrelation between the drying dynamics of the precursor solution thin‐film and the quality of the blade coated polycrystalline perovskite thin‐films. Precisely defined drying conditions are established using a temperature‐stabilized drying channel purged with a laminar flow of dry air. The dedicated channel is equipped with laser reflectometry at multiple probing positions, allowing for in situ monitoring of the perovskite solution thin‐film thickness during the drying process. Based on the drying dynamics as measured at varying drying parameters, namely at varying temperature and laminar air flow velocity, a quantitative model on the drying of perovskite thin‐films is derived. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000097909
Veröffentlicht am 04.11.2019
Coverbild
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Institut für Thermische Verfahrenstechnik (TVT)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 1614-6832, 1614-6840
KITopen-ID: 1000097909
HGF-Programm 43.22.03 (POF III, LK 01)
Erschienen in Advanced energy materials
Band 9
Heft 39
Seiten Article no: 1901581
Vorab online veröffentlicht am 27.08.2019
Nachgewiesen in Web of Science
Scopus
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