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Comparative Study of Printed Multilayer OLED Fabrication through Slot Die Coating, Gravure and Inkjet Printing, and Their Combination

Merklein, Lisa ; Daume, Dominik ; Braig, Felix ; Schlisske, Stefan ; Rödlmeier, Tobias ; Mink, Marvin ; Kourkoulos, Dimitrios ; Ulber, Benjamin ; Di Biase, Manuela ; Meerholz, Klaus ; Hernandez-Sosa, Gerardo ; Lemmer, Uli ; Sauer, Hans Martin ; Dörsam, Edgar ; Scharfer, Philip ; Schabel, Wilhelm (2019)
Comparative Study of Printed Multilayer OLED Fabrication through Slot Die Coating, Gravure and Inkjet Printing, and Their Combination.
In: Colloids and Interfaces, 3 (1)
doi: 10.3390/colloids3010032
Artikel, Bibliographie

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Kurzbeschreibung (Abstract)

In this study, multilayer organic light-emitting diodes (OLEDs) consisting of three solution-processed layers are fabricated using slot die coating, gravure printing, and inkjet printing, techniques that are commonly used in the industry. Different technique combinations are investigated to successively deposit a hole injection layer (poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS)), a cross-linkable hole transport layer (N,N′-bis(4-(6-((3-ethyloxetan-3-yl)methoxy)-hexyloxy)phenyl)-N,N′-bis(4-methoxyphenyl)biphenyl-4,4′-diamin (QUPD)), and a green emissive layer (TSG-M) on top of each other. In order to compare the application techniques, the ink formulations have to be adapted to the respective process requirements. First, the influence of the application technique on the layer homogeneity of the different materials is investigated. Large area thickness measurements of the layers based on imaging color reflectometry (ICR) are used to compare the application techniques regarding the layer homogeneity and reproducible film thickness. The total stack thickness of all solution-processed layers of 32 OLEDs could be reproduced homogeneously in a process window of 30 nm for the technique combination of slot die coating and inkjet printing. The best efficiency of 13.3 cd A⁻¹ is reached for a process combination of slot die coating and gravure printing. In order to enable a statistically significant evaluation, in total, 96 OLEDs were analyzed and the corresponding 288 layers were measured successively to determine the influence of layer homogeneity on device performance.

Typ des Eintrags: Artikel
Erschienen: 2019
Autor(en): Merklein, Lisa ; Daume, Dominik ; Braig, Felix ; Schlisske, Stefan ; Rödlmeier, Tobias ; Mink, Marvin ; Kourkoulos, Dimitrios ; Ulber, Benjamin ; Di Biase, Manuela ; Meerholz, Klaus ; Hernandez-Sosa, Gerardo ; Lemmer, Uli ; Sauer, Hans Martin ; Dörsam, Edgar ; Scharfer, Philip ; Schabel, Wilhelm
Art des Eintrags: Bibliographie
Titel: Comparative Study of Printed Multilayer OLED Fabrication through Slot Die Coating, Gravure and Inkjet Printing, and Their Combination
Sprache: Englisch
Publikationsjahr: 2019
Ort: Basel
Verlag: MDPI
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Colloids and Interfaces
Jahrgang/Volume einer Zeitschrift: 3
(Heft-)Nummer: 1
Kollation: 17 Seiten
DOI: 10.3390/colloids3010032
URL / URN: https://www.mdpi.com/2504-5377/3/1/32
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Kurzbeschreibung (Abstract):

In this study, multilayer organic light-emitting diodes (OLEDs) consisting of three solution-processed layers are fabricated using slot die coating, gravure printing, and inkjet printing, techniques that are commonly used in the industry. Different technique combinations are investigated to successively deposit a hole injection layer (poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS)), a cross-linkable hole transport layer (N,N′-bis(4-(6-((3-ethyloxetan-3-yl)methoxy)-hexyloxy)phenyl)-N,N′-bis(4-methoxyphenyl)biphenyl-4,4′-diamin (QUPD)), and a green emissive layer (TSG-M) on top of each other. In order to compare the application techniques, the ink formulations have to be adapted to the respective process requirements. First, the influence of the application technique on the layer homogeneity of the different materials is investigated. Large area thickness measurements of the layers based on imaging color reflectometry (ICR) are used to compare the application techniques regarding the layer homogeneity and reproducible film thickness. The total stack thickness of all solution-processed layers of 32 OLEDs could be reproduced homogeneously in a process window of 30 nm for the technique combination of slot die coating and inkjet printing. The best efficiency of 13.3 cd A⁻¹ is reached for a process combination of slot die coating and gravure printing. In order to enable a statistically significant evaluation, in total, 96 OLEDs were analyzed and the corresponding 288 layers were measured successively to determine the influence of layer homogeneity on device performance.

Fachbereich(e)/-gebiet(e): 16 Fachbereich Maschinenbau
16 Fachbereich Maschinenbau > Institut für Druckmaschinen und Druckverfahren (IDD)
16 Fachbereich Maschinenbau > Institut für Druckmaschinen und Druckverfahren (IDD) > Funktionales Drucken
Profilbereiche
Profilbereiche > Thermo-Fluids & Interfaces
Hinterlegungsdatum: 29 Apr 2019 07:17
Letzte Änderung: 04 Dez 2023 12:59
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