Slot-Die Coating of Double Polymer Layers for the Fabrication of Organic Light Emitting Diodes

C, Amruth; Colella, Marco; Griffin, Jonathan; Kingsley, James; Scarratt, Nicholas; Luszczynska, Beata; Ulanski, Jacek

Abstract

This study presents the slot-die coating process of two layers of organic materials for the fabrication of organic light emitting diodes (OLEDs). Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), which is commonly used in OLEDs and in organic photovoltaic devices as the hole injection layer (HIL), has been deposited via slot-die coating. Uniform films of PEDOT:PSS were obtained after optimizing the slot-die processing parameters: substrate temperature, coating speed, and ink flow rate. The film quality was examined using optical microscopy, profilometry, and atomic force microscopy. Further, poly(9,9-dioctylfluorene) (F8) and poly(9,9-dioctylfluorene-alt-benzothiadiazole) (F8BT), a well know polymer blend F8:F8BT, which is used as an emissive layer in OLEDs, has been slot-die coated. The optoelectronic properties of the slot-die coated F8:F8BT films were examined by means of photoluminescence (PL) and electroluminescence (EL) studies. The fabricated OLEDs, consisting of slot-die coated PEDOT:PSS and F8:F8BT films, were characterized to record the brightness and current efficiency

Citation

C, A., Colella, M., Griffin, J., Kingsley, J., Scarratt, N., Luszczynska, B., & Ulanski, J. (2019). Slot-Die Coating of Double Polymer Layers for the Fabrication of Organic Light Emitting Diodes. Micromachines, 10(1), Article 53. https://doi.org/10.3390/mi10010053

• Journal Article Type: Article
• Acceptance Date: Jan 9, 2019
• Online Publication Date: Jan 14, 2019
• Publication Date: Jan 14, 2019
• Deposit Date: Feb 1, 2019
• Publicly Available Date: Feb 1, 2019
• Journal: Micromachines
• Electronic ISSN: 2072-666X
• Publisher: MDPI
• Peer Reviewed: Peer Reviewed
• Volume: 10
• Issue: 1
• Article Number: 53
• DOI: https://doi.org/10.3390/mi10010053
• Public URL: https://durham-repository.worktribe.com/output/1308957