Organic base modulation triodes and their inverters on flexible substrates

Shiau Shin Cheng, You Che Chuang, Dhananjay Kekuda, Chun Wei Ou, Meng Chyi Wu, Chi Wei Chu

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Abstract

A vertical-type transistor, organic base modulation triode (OBMT), which is fabricated employing two back-to-back diodes on a flexible plastic substrate, was investigated. The substrates were precleaned using detergent, acetone, isopropyl alcohol, and treated with an UV-ozone cleaner for 15 min. A Au layer 30nm thick was deposited on the glass or PET substrate as the collector electrode. A thin Al layer was deposited as the base layer, and a LiF layer of 0.4nm was thermally evaporated as the carrier-injection enhancement layer. Subsequently, a 20 nm thick NPB layer was thermally evaporated to enhance the carrier energy, and a pentacene layer 140 nm thick was thermally evaporated. All organic materials and metal electrodes were deposited in a thermal-evaporation chamber at a base pressure of 10-6 Torr. The OBMT shows a high output current with an apparent saturation region at low voltages.

Original languageEnglish
Pages (from-to)1860-1864
Number of pages5
JournalAdvanced Materials
Volume21
Issue number18
DOIs
Publication statusPublished - 11-05-2009

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Cheng, S. S., Chuang, Y. C., Kekuda, D., Ou, C. W., Wu, M. C., & Chu, C. W. (2009). Organic base modulation triodes and their inverters on flexible substrates. Advanced Materials, 21(18), 1860-1864. https://doi.org/10.1002/adma.200802506