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Evaluation of the Dispersion Stability of AZO Mesocrystals for Their Processing into Functional Thin Films Using Small Angle X-ray Scattering

Ungerer, Julian; Thurm, Ann-Kathrin; Garnweitner, Georg; Nirschl, Hermann

Abstract:
Within the scope of the comprehensive elucidation of the entire process chain for the production of highly functional thin films made of semiconducting aluminum-doped zinc oxide ( AZO ) nanocrystals, this work deals with the detailed investigation of the stabilization sub-process, considering the requirements for the subsequent coating process. An innovative investigation procedure using non-invasive small angle X-ray scattering ( SAXS ) is developed, enabling an evaluation of qualitative and quantitative dispersion stability criteria of sterically stabilized AZO nanocrystals. On the one hand, qualitative criteria for minimizing layer inhomogeneities due to sedimentation as well as aggregate formation are discussed, enabling a high particle occupancy density. On the other hand, a procedure for determining the AZO concentration using SAXS , both in the stable phase and in the non-stabilized phase, is demonstrated to provide a quantitative evaluation of the stabilization success, having a significant impact on the final layer thickness. The obtained insights offer a versatile tool for the precise stabilization process control based on synthesis process using SAXS to meet coating specific requirements and thus a successful integration into the entire process chain for the production of functional AZO thin films.

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Verlagsausgabe §
DOI: 10.5445/IR/1000121167
Veröffentlicht am 10.07.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mechanische Verfahrenstechnik und Mechanik (MVM)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2073-4352
KITopen-ID: 1000121167
Erschienen in Crystals
Verlag MDPI
Band 10
Heft 5
Seiten Art.Nr. 374
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Gefördert vom Ministerium für Wissenschaft, Forschung und Kunst Baden-Württemberg (MWK) im Rahmen des Open-Access-Förderprogramms "BW BigDIWA"
Vorab online veröffentlicht am 06.05.2020
Schlagwörter aluminum-doped zinc oxide; mesocrystals; non-invasive SAXS analysis; dispersion stability criteria; particle morphology; transparent conductive oxide; functional thin films
Nachgewiesen in Web of Science
Scopus
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