A simple route to fabricate defect-free Ag-nanoparticle–carbon-nanotube composite-based high-resolution mesh flexible transparent conducting electrodes (FTCEs) is explored. In the selective photonic sintering-based patterning process, a highly soft rubber or thin plastic substrate is utilized to achieve close and uniform contact between the composite layer and photomask, with which uniform light irradiation can be obtained with diminished light diffraction. This well-controlled process results in developing a fine and uniform mesh pattern (≈12 μm). The mesh patternability is confirmed to be dependent on heat distribution in the selectively light-irradiated film and the pattern design for FTCE could be adopted for more precise patterns with desired performance. Moreover, using a very thin substrate could allow the mesh to be positioned closer to the strain-free neutral mechanical plane. Due to strong interfacial adhesion between the mesh pattern and substrate, the mesh FTCE could tolerate severe mechanical deformation without performance degradation. It is demonstrated that a transparent heater with fine mesh patterns on thin substrate can maintain stability after 100 repeated washing test cycles in which a variety of stress situations occurring in combination. The presented highly durable FTCE and simple fabrication processes may be widely adoptable for various flexible, large-area, and wearable optoelectronic devices.
Bibliographical noteFunding Information:
Z.Z. and K.W. contributed equally to this work. This work was supported by the Ministry of Trade, Industry & Energy (MOTIE, Korea), under the Advanced Technology Center (ATC) Program (10067668), Technology Innovation Program (10052802), and government-funded Research Program of the Korea Institute of Machinery and Materials Technology Innovation Program (NK210D). It was also supported by a National Research Foundation of Korea (NRF) funded by the Korean government (MSIP) (2012R1A3A2026417, 2016M1A2A2940915). Note: The Acknowledgements were updated on May 24, 2018 after initial online publication.
All Science Journal Classification (ASJC) codes
- Materials Science(all)