Organic/oxide hybrid complementary thin-film transistor inverter in vertical stack for logic, photo-gating, and ferroelectric memory operation

Chan Ho Park, Hee Sung Lee, Kwang H. Lee, Dong Ho Kim, Hye Ri Kim, Gun Hwan Lee, Jae Hoon Kim, Seongil Im

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We demonstrated a vertically stacked complementary thin-film transistor inverter (VS-CTFT inverter) for the purpose of maximizing potentials beyond logic applications by including photo-gating and ferroelectric memory operation with properly selected organic and oxide materials. For our VS-CTFT inverter for logic and photo-gating, we used a thermally-evaporated p-channel pentacene layer, sputter-deposited n-channel GaZnSn-based oxide (GZTO), and atomic layer deposited (ALD) Al2O3 dielectric. As a more advanced hybrid approach, we also adopted a ferroelectric poly(vinylidene fluoride/trifluoroethylene) [P(VDF-TrFE)] layer for a CTFT nonvolatile memory inverter with a pentacene memory TFT which is vertically stacked on a top-gate GZTO TFT. Our VS-CTFT inverter nicely displays effective photo- and electrical-gating with a high voltage gain, dynamically operating in the low-voltage regime of 3, 5, and 8 V. The ferroelectric memory inverter as an ultimate hybrid device form demonstrates promising retention properties as triggered by ±20 V gate pulses.

Original languageEnglish
Pages (from-to)1533-1538
Number of pages6
JournalOrganic Electronics
Volume12
Issue number9
DOIs
Publication statusPublished - 2011 Sep

Bibliographical note

Funding Information:
The authors acknowledge the financial support from NRF (NRL program, No. 2011-0000375), BK21 Project, the 21st Century Frontier R&D Program funded by the MKE (Information Display R&D center, F0004022-2009). C.H. Park thanks for the Seoul Science Fellowship and Seoam Fellowship.

All Science Journal Classification (ASJC) codes

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

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