A cascade energy band structure enhances the carrier energy in organic vertical-type triodes

Shiau Shin Cheng, Mohan Ramesh, Guan Yuan Chen, Chun Lin Fung, Li Ming Chen, Meng Chyi Wu, Hong-Cheu Lin, Chih Wei Chu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Organic vertical-type triodes (OVTs) based on the cascade energy band structure as emitter layer are studied. The electric characteristics were dramatically enhanced while incorporating the cascade energy under current driving and voltage driving modes. The improvement is attributed to that injection carriers can obtain higher energy through a stepwise energy level. When the device has a layered structure of F16CuPC (10 nm)/PTCDI (10 nm)/pentacene (100 nm) in emitter, it exhibits a common-base transport factor of 0.99 and a common-emitter current gain of 225 under current driving mode and exhibits a high current modulation-exceeding -520 μA for a low collector voltage of -5 V and a base voltage of -5 V and the current on/off ratio of 103 under voltage driving mode. Furthermore, we realized first organic current mirror that exhibited out/in current ratio of 0.75 and output resistance of 105 Ω by using the OVTs.

Original languageEnglish
Pages (from-to)2284-2289
Number of pages6
JournalOrganic Electronics
Volume14
Issue number9
DOIs
StatePublished - 1 Jan 2013

Keywords

  • Cascade-type
  • Current gain
  • Current mirror
  • Organic semiconductor
  • Transport factor
  • Vertical-type transistor

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