Gravure printed PEDOT:PSS as anode for flexible ITO-free organic light emitting diodes

Montanino, Maria; Sico, Giuliano; Prontera, Carmela Tania; Mauro, Anna De Girolamo Del; Aprano, Salvatore; Maglione, Maria Grazia; Minarini, Carla

doi:10.3144/expresspolymlett.2017.48

Cited by 17 publications

(11 citation statements)

References 19 publications

(33 reference statements)

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“…The suitability of the transparent conductor films thus prepared was demonstrated by their application in S2S deposited OPV devices. In a later paper by Montanino et al from the same research group, the addition of 5 vol% DMSO to the ink formulation gave an improved performance of 125 Ω sq −1 at a transmission of 90% at 550 nm at a speed of 60 m min −1 . In this case, the films were further processed by S2S techniques into functioning OLEDs.…”

Section: Printing and Coating Of Transparent Conductorsmentioning

confidence: 97%

Roll‐to‐Roll Fabrication of Solution Processed Electronics

Abbel¹,

2018

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The production of electronic devices using solution based ("wet") deposition technologies has some decisive technical and commercial advantages compared to competing approaches like vacuum based ("dry") manufacturing. Particularly, the potential to scale up production processes to large areas and high volumes by introducing continuous roll-to-roll (R2R) methods on flexible substrates has been the topic of intense studies from both applied research institutes and industry already for some years. Decisive steps forward have been achieved during that time, resulting in the dawn of commercial applications for a number of processes, while additional development work is still needed in some other fields. This review summarizes the work published during the last few years on the R2R printing and wet coating of electronic devices. An overview is presented of the basic operational principles for the most commonly used R2R printing and coating methods and techniques for proper web handling in R2R lines. Then, the most commonly used types of flexible substrate materials are introduced, followed by a review of the work published in the application areas of transparent conductor materials, printed electric connections, light emitting devices, photovoltaic energy generation, printed logic, and sensing.

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Section: Printing and Coating Of Transparent Conductorsmentioning

confidence: 97%

Roll‐to‐Roll Fabrication of Solution Processed Electronics

Abbel¹,

2018

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“…Solution‐processing techniques such as printing and roll‐to‐roll coating methods are ideal for upscaling future OLEDs because of low operational costs and high throughput. [ 6–8 ] Researchers and scientists have demonstrated OLED fabrication through printing techniques such as inkjet, [ 9,10 ] screen, [ 11,12 ] gravure, [ 13,14 ] and flexography; [ 15,16 ] and roll‐to‐roll coating techniques such as slot‐die (SD), [ 17,18 ] blade, [ 19,20 ] and spray. [ 21,22 ] The slot‐die coating method has benefits among the roll‐to‐roll solution‐coating techniques, such as it keeps the inks in a closed system (where inks are not exposed to the surroundings) until deposition and enables a strip coating (in addition to large‐area coating).…”

Section: Introductionmentioning

confidence: 99%

Slot‐Die Coating of All Organic/Polymer Layers for Large‐Area Flexible OLEDs: Improved Device Performance with Interlayer Modification

Amruth

Dubey

Pahlevani

et al. 2021

Adv Materials Technologies

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Organic light‐emitting diodes (OLEDs) fabricated on flexible transparent substrates have found application in displays, lighting, and signage. Optimization of the fabrication procedures is critical for commercialization to maximize performance and reduce costs. Utilization of the slot‐die coating technique, a solution‐processing roll‐to‐roll method, has emerged as a viable method to manufacture flexible OLED devices. Here, the fabrication of flexible OLEDs via the slot‐die coating technique under ambient condition is reported. The OLEDs have a simple architecture of polyethylene terephthalate (PET)/indium–tin oxide (ITO)/hole injection layer (HIL)/emissive layer (EML)/electron injection layer (EIL)/Ag, where poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) is used as the HIL, Super Yellow (SY, poly(1,4‐phenylenevinylene) copolymer) is used as the EML, and poly((9,9‐bis(3′‐(N,N‐dimethylamino)propyl)‐2,7‐fluorene)‐alt‐2,7‐(9,9‐dioctylfluorene)) (PFN) is used as the EIL. The optimization of the PFN layer using slot‐die coating technique is focused by varying solvent, solvent additives, substrate temperature, and coating speeds. The OLEDs that have PFN layers processed with the known solvent additives, 1,8‐diiodooctane (DIO) or diphenyl ether (DPE), show a performance increase compared to OLEDs based on PFN layers processed with no solvent additives. Finally, large‐area multicolor OLEDs are constructed with organic/polymer layers being slot‐die coated in sequence, of which all display homogeneous luminance under bending/folding conditions, highlighting the potential of this simple device structure and processing method.

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“…On the other hand, solution processed roll-to-roll (R2R) printing can offer inexpensive and high throughput fabrication for large-area OLEDs [4][5][6][7][8][9] . To this end, current research and development have seen the use of inkjet printing 10,11 , gravure printing 12,13 , flexography printing 14,15 , screen printing 16,17 , slot-die coating 18 , blade coating 19,20 and spray coating 21,22 to fabricate OLEDs. Each technique has its pros and cons; however, in our opinion, the selection of the deposition method is decided by the target application.…”

Section: Introductionmentioning

confidence: 99%