Journal article
Strong molecular weight effects of gate-insulating memory polymers in low-voltage organic nonvolatile memory transistors with outstanding retention characteristics
- Abstract:
- Organic nonvolatile memory transistors, featuring low-voltage operation (5 V) and high retention characteristics (>10 000 cycles), are demonstrated by introducing high molecular weight poly(vinyl alcohol) (PVA) as a gate insulating layer. PVA polymers with four different molecular weights (9.5–166 kDa) are examined for organic memory devices with poly(3-hexylthiophene) channel layers. All devices show excellent p-type transistor behavior and strong hysteresis in the transfer curves, but the lower molecular weight PVA delivers the higher hole mobility and the wider memory window. This has been attributed to the higher ratio of hydroxyl group dipoles that align in the out-of-plane direction of the PVA layers, as supported by impedance spectroscopy (dielectric constants), polarized Fourier transform-infrared spectroscopy and synchrotron radiation grazing incidence X-ray diffraction measurements. However, outstanding retention characteristics (<4% current variation after 10 000 cycles) have been achieved with the higher molecular weight PVA (166 kDa) rather than the lower molecular weight PVA (9.5 kDa).
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 2.0MB, Terms of use)
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- Publisher copy:
- 10.1038/am.2015.135
Authors
- Publisher:
- Springer Nature
- Journal:
- NPG Asia Materials More from this journal
- Volume:
- 8
- Issue:
- 1
- Pages:
- e235-e235
- Publication date:
- 2016-01-15
- DOI:
- EISSN:
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1884-4057
- ISSN:
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1884-4049
- Pubs id:
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pubs:601695
- UUID:
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uuid:e50d0d94-879e-4447-9f47-9ef04aa1cf99
- Local pid:
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info:fedora/pubs:601695
- Source identifiers:
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601695
- Deposit date:
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2016-03-10
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- Copyright holder:
- *Copyright holder name ("et al" as required)*
- Copyright date:
- 2016
- Notes:
- This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
- Licence:
- CC Attribution (CC BY)
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