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Interfacial effects on resistive switching of vacuum spray deposited polymer thin films embedded with TiO2 nanoparticles under bending strain.
- Source :
-
Organic Electronics . Oct2018, Vol. 61, p170-176. 7p. - Publication Year :
- 2018
-
Abstract
- The resistive switching of polymer films embedded with nanoparticles (NPs) offers the promise for future flexible and transparent memory applications. However, the polymer/NP interfacial effect on switching behavior under various mechanical stimuli is a vital issue that has received scant attention. Here, polymer thin films embedded with TiO 2 NPs were fabricated by vacuum spray method to study how the polymer/NP interface affects the switching behavior, especially under severe bending conditions. Compared with that of the initial sample, the ON/OFF ratio decreases by two orders of magnitude with the conduction mechanism translating from trap-controlled space charge limited current conduction to Poole−Frankel emission after repetitive bending. Surface wrinkle and interfacial micro cracks were observed. Using the finite element analyses and quantum chemical calculation, we show that the TiO 2 NPs produce strain-sensitive regions within the film, and micro cracks initiate and propagate along the polymer/NP interface under severe bending. Such cracks can serve as vacuum gap to block the carriers transport and further result in the deterioration of switching performance. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NANOPARTICLES
*POLYMER films
*TITANIUM oxides
*THIN films
*RESISTIVE force
Subjects
Details
- Language :
- English
- ISSN :
- 15661199
- Volume :
- 61
- Database :
- Academic Search Index
- Journal :
- Organic Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 130838853
- Full Text :
- https://doi.org/10.1016/j.orgel.2018.05.042