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Bipolar Resistive Switching Characteristics of Poly(3,4-Ethylene-Dioxythiophene): Poly(Styrenesulfonate) Thin Film
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- Authors
- Hu Young Jeong, Jong Yun Kim, Tae Hyun Yoon, Sung-Yool Choi
- Issue Date
- 2010-01
- Citation
- Current Applied Physics, v.10, no.1, pp.46-49
- ISSN
- 1567-1739
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- We investigated the reversible resistive switching of poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) thin films sandwiched between Al electrodes. The J-V sweep curve showed a hysteretic behavior which depends on the polarity of the applied voltage bias. From the analysis of I-V curves, it was revealed that the charge transport through the junction was governed by the bulk space-charge-limited conduction (SCLC) model. Using transmission electron microscopy (TEM) analysis, it was confirmed that the initial high resistance state of PEDOT:PSS films is related with the segregation of PSS- chains induced by redox reaction between a Al metal electrode and PEDOT:PSS film. Positive space charges present on the top region of PEDOT:PSS films can be proposed as a possible trap centers of electron trapping and detrapping process. © 2009 Elsevier B.V. All rights reserved.
- KSP Keywords
- 4-ethylenedioxythiophene, Charge transport, Electron microscopy(SEM), I-V curves, Initialization Vector(IV), J-V, Reversible resistive switching, Space charge limited conduction, Trap centers, applied voltage, bipolar resistive switching