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http://hdl.handle.net/1942/18667
Title: | Towards fully spray coated organic light emitting devices | Authors: | GILISSEN, Koen STRYCKERS, Jeroen MANCA, Jean DEFERME, Wim |
Issue Date: | 2014 | Publisher: | SPIE-INT SOC OPTICAL ENGINEERING | Source: | So, Franky; Adachi, Chihaya (Ed.). ORGANIC LIGHT EMITTING MATERIALS AND DEVICES XVIII. Proceedings of SPIE, 9183. Art. Nr. UNSP 918311. | Series/Report: | Proceedings of SPIE | Series/Report no.: | 9183 | Abstract: | Pi-conjugated polymer light emitting devices have the potential to be the next generation of solid state lighting. In order to achieve this goal, a low cost, efficient and large area production process is essential. Polymer based light emitting devices are generally deposited using techniques based on solution processing e.g.: spin coating, ink jet printing. These techniques are not well suited for cost-effective, high throughput, large area mass production of these organic devices. Ultrasonic spray deposition however, is a deposition technique that is fast, efficient and roll to roll compatible which can be easily scaled up for the production of large area polymer light emitting devices (PLEDs). This deposition technique has already successfully been employed to produce organic photovoltaic devices (OPV)(1). Recently the electron blocking layer PEDOT:PSS2 and metal top contact(3) have been successfully spray coated as part of the organic photovoltaic device stack. In this study, the effects of ultrasonic spray deposition of polymer light emitting devices are investigated. For the first time - to our knowledge -, spray coating of the active layer in PLED is demonstrated. Different solvents are tested to achieve the best possible spray-able dispersion. The active layer morphology is characterized and optimized to produce uniform films with optimal thickness. Furthermore these ultrasonic spray coated films are incorporated in the polymer light emitting device stack to investigate the device characteristics and efficiency. Our results show that after careful optimization of the active layer, ultrasonic spray coating is prime candidate as deposition technique for mass production of PLEDs. | Notes: | [Gilissen, Koen; Stryckers, Jeroen; Deferme, Wim] Hasselt Univ, Inst Mat Res IMO IMOMEC Engn Mat & Applicat, B-3590 Diepenbeek, Belgium. | Keywords: | Organic light emitting diodes; ultrasonic spray coating; solution processing;coating; dispersion; electrons; inkjet technology; metals; organic light emitting diodes; organic photovoltaics; polymers; solid state lighting; ultrasonics | Document URI: | http://hdl.handle.net/1942/18667 | ISBN: | 978-1-62841-210-9 | DOI: | 10.1117/12.2060994 | ISI #: | 000348036200008 | Category: | C1 | Type: | Proceedings Paper | Validations: | ecoom 2017 |
Appears in Collections: | Research publications |
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