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Highly Stable and Flexible Memristive Devices Based on Polyvinylpyrrolidone: WS2 Quantum Dots

Title
Highly Stable and Flexible Memristive Devices Based on Polyvinylpyrrolidone: WS2 Quantum Dots
Author
김태환
Keywords
LARGE-AREA SYNTHESIS; HYDROTHERMAL SYNTHESIS; MEMORY; MOS2; NANOCOMPOSITES; FILMS; EXFOLIATION; TRANSITION
Issue Date
2020-04
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v. 10, no. 1, article no. 5793
Abstract
Tungsten disulfide (WS2) quantum dots (QDs) embedded in polyvinylpyrrolidone (PVP) based flexible memristive devices were prepared, and those devices exhibited typical bistable electrical switching and remarkable nonvolatile memristive behaviors. Maximum electricity ON/OFF ratio obtained from the current-voltage (I-V) curves of the device is close to 10(4). The set voltage of the device is +0.7 V, which effectively reduced the energy consumption. The retention times extracted from data for the devices were as large as 1 x 10(4) s, which points to these devices having nonvolatile characteristics. Moreover, the highly flexible characteristics of the devices were demonstrated by bending the devices. The carrier transport mechanisms were explained by fitting the I-V curves, and possible operating mechanisms of the devices can be described based on the electron trapping and detrapping processes. WS2 QDs uniformly dispersed in pure transparent N, N-Dimethylformamide (DMF) were obtained by using ultrasonication and a hydrothermal process in this work.
URI
https://www.nature.com/articles/s41598-020-62721-5https://repository.hanyang.ac.kr/handle/20.500.11754/166092
ISSN
2045-2322
DOI
10.1038/s41598-020-62721-5
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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