Lindh, E.M.Sandstrom, A.Andersson, M.R.Edman, L.2025-12-172025-12-172016Light: Science & Applications, 2016; 5(e165050):1-42047-75382047-7538https://hdl.handle.net/11541.2/127996We present a direct-write patterning method for the realization of electroluminescent (EL) line art using a surface-emissive light-emitting electrochemical cell with its electrolyte and EL material separated into a bilayer structure. The line-art emission is achieved through subtractive patterning of the electrolyte layer with a stylus, and the single-step patterning can be either manual for personalization and uniqueness or automated for high throughput and repeatability. We demonstrate that the light emission is effectuated by cation-assisted electron injection in the patterned regions and that the resulting emissive lines can be as narrow as a few micrometers. The versatility of the method is demonstrated through the attainment of a wide range of light-emission patterns and colors using a variety of different materials. Wepropose that this low-voltage-driven and easy-to-modify luminescent line-art technology could be of interest for emerging applications, such as active packaging and personalized gadgets.enCopyright 2016 CIOMP This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 Unported License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the CreativeCommons license, users will need to obtain permission from the license holder to reproduce the material. (http://creativecommons.org/licenses/by-nc-nd/4.0/)direct-write patterninglight-emitting electrochemical cellluminescent line artorganic electronicsJournal article10.1038/lsa.2016.50000374463100006