Journal
FLEXIBLE AND PRINTED ELECTRONICS
Volume 3, Issue 4, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2058-8585/aaeb6c
Keywords
resistors; inkjet printing; PEDOT:PSS; RC filter; flexible electronics
Categories
Funding
- Multi-University Research Initiative (MURI) program - Office of Naval Research (MURI Award) [N00014-11-1-0690]
- National Science Foundation (NSF) [CMMI-1634263]
- Xerox Research Centre of Canada
- National Science Foundation Graduate Research Fellowship Program [00039202]
- NSF through the MRSEC program
- National Science Foundation through the National Nano Coordinated Infrastructure Network (NNCI) [ECCS-1542202]
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Resistors are essential and ubiquitous building blocks in electronic circuits. Fabrication of printed resistors in a manner compatible with roll-to-roll printing is important for realizing low-cost and high-throughput production of electronic devices. Here we present fully printed resistors fabricated via a novel self-aligned printing method, termed self-aligned capillarity-assisted lithography for electronics (SCALE). Flexible substrates with imprinted features such as reservoirs and capillary channels were prepared by roll-to-roll processing. Functional inks were then delivered sequentially into the reservoirs by inkjet printing and the ink flowed spontaneously into the adjoining channels driven by capillarity. Poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) was used as the resistive material, and silver was used for the electrodes. Using SCALE, we achieved fully inkjet printed, self-aligned resistors with resistance values ranging over five orders of magnitude while keeping the overall dimensions of the devices constant. We then employed SCALE to build low-pass resistor-capacitor filters with cutoff frequency from 0.4 to 27 kHz and excellent operational stability. Overall, this work expands the potential of self-aligned inkjet printing for producing fully printed electronic circuits.
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