Voltage-Controlled Ring Oscillators Based on Inkjet Printed Carbon Nanotubes and Zinc Tin Oxide

Bongjun Kim, Jaeyoung Park, Michael L. Geier, Mark C Hersam, Ananth Dodabalapur

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A voltage-controlled ring oscillator is implemented with double-gate complementary transistors where both the n- and p-channel semiconductors are deposited by inkjet printing. Top gates added to transistors in conventional ring oscillator circuits control not only threshold voltages of the constituent transistors but also the oscillation frequencies of the ring oscillators. The oscillation frequency increases or decreases linearly with applied top gate potential. The field-effect transistor materials system that yields such linear behavior has not been previously reported. In this work, we demonstrate details of a material system (gate insulator, p- and n-channel semiconductors) that results in very linear frequency changes with control gate potential. Our use of a double layer top dielectric consisting of a combination of solution processed P(VDF-TrFE) and Al2O3 deposited by atomic layer deposition leads to low operating voltages and near-optimal device characteristics from a circuit standpoint. Such functional blocks will enable the realization of printed voltage-controlled oscillator-based analog-to-digital converters. (Graph Presented).

Original languageEnglish
Pages (from-to)12009-12014
Number of pages6
JournalACS Applied Materials and Interfaces
Volume7
Issue number22
DOIs
Publication statusPublished - Jun 10 2015

Fingerprint

Carbon Nanotubes
Zinc oxide
Tin oxides
Carbon nanotubes
Transistors
Electric potential
Semiconductor materials
Atomic layer deposition
Networks (circuits)
Variable frequency oscillators
Digital to analog conversion
Field effect transistors
Threshold voltage
Printing
stannic oxide

Keywords

  • carbon nanotube
  • double-gate
  • printed electronics
  • thin-film transistor
  • threshold voltage
  • voltage-controlled oscillator
  • zinc tin oxide

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Voltage-Controlled Ring Oscillators Based on Inkjet Printed Carbon Nanotubes and Zinc Tin Oxide. / Kim, Bongjun; Park, Jaeyoung; Geier, Michael L.; Hersam, Mark C; Dodabalapur, Ananth.

In: ACS Applied Materials and Interfaces, Vol. 7, No. 22, 10.06.2015, p. 12009-12014.

Research output: Contribution to journalArticle

Kim, Bongjun ; Park, Jaeyoung ; Geier, Michael L. ; Hersam, Mark C ; Dodabalapur, Ananth. / Voltage-Controlled Ring Oscillators Based on Inkjet Printed Carbon Nanotubes and Zinc Tin Oxide. In: ACS Applied Materials and Interfaces. 2015 ; Vol. 7, No. 22. pp. 12009-12014.
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