Enhancing the retention properties of ZnO memory transistor by modifying the channel/ferroelectric polymer interface

C. H. Park, Gyubaek Lee, Kwang H. Lee, Seongil Im, Byoung H. Lee, Myung M. Sung

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We report on the fabrication of ZnO nonvolatile memory thin-film transistors (NVM-TFTs) with thin poly(vinylidene fluoride/trifluoroethylene) [P(VDF-TrFE)] ferroelectric layer. Our NVM-TFT operates on glass substrates under low voltage write-erase (WR-ER) pulse of ±20 V with a maximum field effect mobility of ∼1 cm2 /V s, maximum memory window of ∼20 V, and WR-ER current ratio of 4× 102. When the NVM-TFT has a modified channel/ferroelectric interface with an inserted thin Al2 O3 buffer layer, our device shows long retention time of more than 104 s, which is much enhanced compared to that of the other device without the buffer. The dynamic response of our devices with or without the buffer was clear enough to distinguish the WR and ER states as performed with 300 ms pulse.

Original languageEnglish
Article number153502
JournalApplied Physics Letters
Volume95
Issue number15
DOIs
Publication statusPublished - 2009 Oct 22

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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