TY - GEN
T1 - Fabrication of organic transistor based on ink-jet printed copper electrodes
AU - Jeong, Sunho
AU - Kim, Dongjo
AU - Moon, Jooho
PY - 2005
Y1 - 2005
N2 - We have fabricated organic transistors based on ink-jet printed copper as source and drain electrodes. Ink-jet printing of metal nano-particles is an attractive alternative to photolithography for patterning conductive metal lines, due to the low-cost, low-waste and simple process. For conductive copper electrodes at low temperature heat-treatment below 250°C, nano-sized copper particles of 50nm diameter were printed on the highly doped silicon wafer with 300 nm-thick silicon dioxide layer that acts as a dielectric layer. It was observed that the conductivity of the ink-jet printed lines was similar to that of bulk copper material even though the heat-treatment was performed at such a low temperature. To achieve smooth conductive path with high resolution, the printing conditions of the distance between printed droplets, stage moving velocity, and temperature substrates were optimized. Pentacene was evaporated on the printed copper electrodes to fabricate the organic transistor, since pentacene offers higher mobility, better on-off ratio, improved environmental stability, and better reliability than most other organic semiconductors. The measured carrier mobility and on/off ratio of the fabricated bottom-contact organic transistor show similar performance when compared with the transistors based on evaporated gold electrodes.
AB - We have fabricated organic transistors based on ink-jet printed copper as source and drain electrodes. Ink-jet printing of metal nano-particles is an attractive alternative to photolithography for patterning conductive metal lines, due to the low-cost, low-waste and simple process. For conductive copper electrodes at low temperature heat-treatment below 250°C, nano-sized copper particles of 50nm diameter were printed on the highly doped silicon wafer with 300 nm-thick silicon dioxide layer that acts as a dielectric layer. It was observed that the conductivity of the ink-jet printed lines was similar to that of bulk copper material even though the heat-treatment was performed at such a low temperature. To achieve smooth conductive path with high resolution, the printing conditions of the distance between printed droplets, stage moving velocity, and temperature substrates were optimized. Pentacene was evaporated on the printed copper electrodes to fabricate the organic transistor, since pentacene offers higher mobility, better on-off ratio, improved environmental stability, and better reliability than most other organic semiconductors. The measured carrier mobility and on/off ratio of the fabricated bottom-contact organic transistor show similar performance when compared with the transistors based on evaporated gold electrodes.
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M3 - Conference contribution
AN - SCOPUS:29844445099
SN - 0892082585
T3 - Digital Fabrication 2005 - Final Program and Proceedings
SP - 104
BT - Digital Fabrication 2005 - Final Program and Proceedings
T2 - Digital Fabrication 2005
Y2 - 18 September 2005 through 22 September 2005
ER -