摘要
We 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.
基金
support from the Swedish Foundation for Strategic Research
the Swedish Research Council
the Swedish Energy Agency
the Kempe Foundation
the Knut and Alice Wallenberg Foundations
Aforsk.