Fully Printed Light‐Emitting Electrochemical Cells Utilizing Biocompatible Materials |
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Authors: | Johannes Zimmermann Luca Porcarelli Tobias Rödlmeier Ana Sanchez‐Sanchez David Mecerreyes Gerardo Hernandez‐Sosa |
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Affiliation: | 1. Light Technology Institute, Karlsruhe Institute of Technology, Karlsruhe, Germany;2. InnovationLab, Heidelberg, Germany;3. POLYMAT, University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Donostia‐San Sebastian, Spain;4. Department of Bioelectronics, Ecole Nationale Supérieure des Mines, CMP‐EMSE, MOC, Gardanne, France |
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Abstract: | The use of biomaterials and bioinspired concepts in electronics will enable the fabrication of transient and disposable technologies within areas ranging from smart packaging and advertisement to healthcare applications. In this work, the use of a nonhalogenated biodegradable solid polymer electrolyte based on poly(ε‐caprolactone‐co‐trimethylene carbonate) and tetrabutylammonium bis‐oxalato borate in light‐emitting electrochemical cells (LECs) is presented. It is shown that the spin‐cast devices exhibit current efficiencies of ≈2 cd A?1 with luminance over ≈12 000 cd m?2, an order of magnitude higher than previous bio‐based LECs. By a combination of industrially relevant techniques (i.e., inkjet printing and blade coating), the fabrication of LEC devices on a cellulose‐based flexible biodegradable substrate showing lifetimes compatible with transient applications is demonstrated. The presented results have direct implications toward the industrial manufacturing of biomaterial‐based light‐emitting devices with potential use in future biodegradable/biocompatible electronics. |
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Keywords: | biocompatible materials biodegradable electronics inkjet printing light‐emitting electrochemical cells printed electronics |
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