Versatile threshold voltage control of OTFTs via discontinuous pn-heterojunction formation

Boeun Cho, Seong Hun Yu, Moo Hyung Lee, Juhee Lee, Jun Young Lee, Jeong Ho Cho, Moon Sung Kang

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We demonstrate the versatility of the threshold voltage control for organic thin-film transistors (OTFTs) based on formation of discontinuous pn-heterojunction on the active channel layer. By depositing n-type dioctyl perylene tetracarboxylic diimide molecules discontinuously onto base p-type pentacene thin films (the formation of the discontinuous pn-heterojunction), a positive shift of the threshold voltage was attained which enabled realizing a depletion-mode transistor from an original enhancement-mode pristine pentacene transistor. Careful control of the threshold voltage based on this method led assembling a depletion-load inverter comprising a depletion-mode transistor and an enhancement-mode transistor connected in series that yielded tunable signal inversion voltage approaching 0 V. In addition, the tunability could be applied to improve the program/erase signal ratio for non-volatile transistor memories by more than 4 orders of magnitude compared to reference memory devices made of pristine pentacene transistors.

Original languageEnglish
Pages (from-to)3439-3444
Number of pages6
JournalOrganic Electronics
Volume15
Issue number12
DOIs
Publication statusPublished - 2014 Dec

Fingerprint

Thin film transistors
Threshold voltage
Voltage control
threshold voltage
Heterojunctions
heterojunctions
Transistors
transistors
thin films
depletion
Perylene
Data storage equipment
augmentation
versatility
assembling
Thin films
Molecules
inversions
Electric potential
shift

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

Cho, Boeun ; Yu, Seong Hun ; Lee, Moo Hyung ; Lee, Juhee ; Lee, Jun Young ; Cho, Jeong Ho ; Kang, Moon Sung. / Versatile threshold voltage control of OTFTs via discontinuous pn-heterojunction formation. In: Organic Electronics. 2014 ; Vol. 15, No. 12. pp. 3439-3444.
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Versatile threshold voltage control of OTFTs via discontinuous pn-heterojunction formation. / Cho, Boeun; Yu, Seong Hun; Lee, Moo Hyung; Lee, Juhee; Lee, Jun Young; Cho, Jeong Ho; Kang, Moon Sung.

In: Organic Electronics, Vol. 15, No. 12, 12.2014, p. 3439-3444.

Research output: Contribution to journalArticle

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