Fabrication of organic thin film transistor based on the ink-jet printed electrodes of nano silver particles

Dongjo Kim, Sunho Jeong, Sul Lee, Bong Kyun Park, Jooho Moon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


In this work, we here developed a conductive ink which contains silver nano-particles from which the electrodes for organic thin film transistor were directly patterned by ink-jet printing. Nano-sized silver panicles having ∼ 20 nm diameter was used for the direct metal printing. Silver conductive ink was printed on the heavily doped n-type silicon wafer with 200-nm thick thermal SiO2 layer as a substrate. To achieve a high line resolution and smooth conductive path, the printing conditions such as the inter-drop distance, stage moving velocity and temperature of the pre-heated substrates were optimized. After the heat-treatment at temperatures of about 100 ∼ 300 °C for 30 min, the printed silver patterns exhibit metal-like appearance and the conductivity. To fabricate a coplanar type TFTs, an active material of semiconducting oligomer, which was dissolved in a proper solvent, was deposited between the ink-jet printed silver electrodes by solution process. The output and transfer characterization was measured in air. The OTFT with the ink-jetted source/drain electrodes show a mobility of 1.3 × 10-3 cm 2 V-1 s-1 in the saturation regime and on/off current ratio over 103 and a threshold voltage of about-13 V.

Original languageEnglish
Title of host publicationConjugated Organic Materials
Subtitle of host publicationSynthesis, Structure, Device, and Applications
PublisherMaterials Research Society
Number of pages5
ISBN (Print)1558998942, 9781558998940
Publication statusPublished - 2006
Event2006 MRS Spring Meeting - San Francisco, CA, United States
Duration: 2006 Apr 172006 Apr 21

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2006 MRS Spring Meeting
Country/TerritoryUnited States
CitySan Francisco, CA

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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