Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 15, Pages 12380-12387Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am502233y
Keywords
metal grid electrode; evaporative assembly; flow coating; transparent electrode; organic electronic device
Funding
- KANEKA/SKKU Incubation Center
- Kaneka Corp. in Japan, the Center for Advanced Soft-Electronics - Ministry of Science, ICT and Future Planning as Global Frontier Project [2013M3A6A5073177]
- National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2009-0083540]
- World-Class 300 Project - Small and Medium Business Administration (SMBA) in Korea
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We propose a novel approach to fabricating flexible transparent metallic grid electrodes via evaporative deposition involving flow-coating. A transparent flexible metal grid electrode was fabricated through four essential steps including: (1) polymer line pattern formation on the thermally evaporated metal layer onto a plastic substrate; (ii) rotation of the stage by 90 and the formation of the second polymer line pattern; (iii) etching of the unprotected metal region; and (iv) removal of the residual polymer from the metal grid pattern. Both the metal grid width and the spacing were systematically controlled by varying the concentration of the polymer solution and the moving distance between intermittent stop times polymer blade. The optimized Au grid electrodes exhibited an optical transmittance of 92% at 550 nm and a sheet resistance of 97 Omega/sq. The resulting metallic grid electrodes were successfully applied to various organic electronic devices, such as organic field-effect transistors (OFETs), organic light-emitting diodes (OLEDs), and organic solar cells (OSCs).
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