Efficient multilayered organic light-emitting diodes (OLEDs) were fabricated using contact printing. In order to overcome the mixing problem occurring between the organic layers during the solution processes, contact printing was utilized on a small molecule layer. Since this contact printing allows multilayer stacking without the damage caused by organic solvents, high-performance OLEDs could be fabricated with solution-based small molecules employing a low cost process. In this study, the performance of the multilayered OLEDs manufactured by the contact printing process is significantly enhanced than that found in spin-coated devices.
Bibliographical noteFunding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MEST) ( CAFDC-20100009869 ), World Class University ( WCU, R32-2008-000-10082-0 ) Project of the MEST (KOSEF), and the IT R&D Program of MKE/KEIT (No. 2009-F-016-01 , Development of Eco-Emotional OLED Flat-Panel Lighting). We thank the staff of KBSI for technical assistance. T.H. Park was financially supported by Hi Seoul Science (Humanities) Fellowship funded by Seoul Scholarship Foundation.
- Contact printing
- Organic light-emitting diodes
- Small molecule
- Solution process
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
- Materials Chemistry