Carrier transport mechanisms of organic bistable devices fabricated utilizing colloidal ZnO quantum dot-polymethylmethacrylate polymer nanocomposites

Son, Dong Ick; You, Chan Ho; Jung, Jae Hun; Kim, Tae Whan

doi:10.1063/1.3454774

Cited by 53 publications

(27 citation statements)

References 23 publications

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“…[44]. The value of on/off ratio reported for a two terminal device containing graphene quantum dots embedded in the matrix of poly(ethylene glycol) bis(carboxymethyl) ether between two gold electrodes in a planar structure operating at ±4.3V is at least three orders of magnitude smaller than the one obtained in the presented investigation [45].…”

Section: Bistable Electrical Behaviourcontrasting

confidence: 41%

Hybrid phthalocyanine/lead sulphide nanocomposite for bistable memory switches

Khozaee

Sosa‐Vargas

Cammidge

et al. 2015

Mater. Res. Express

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A simple, one-step method is employed to produce, at room temperature, a single layer of an organic-inorganic nanocomposite containing non-aggregated lead sulphide (PbS) quantum dots (QDs) embedded in a 130nm thick solution processed film of the organic semiconductor 6PcH2 (metal-free, non-peripherally substituted octahexyl phthalocyanine) on indium tin oxide (ITO). The mean size of PbS QDs is found from X-ray diffraction and transmission electron microscopy techniques to be much smaller than the Bohr radius. Further evidence of the quantum confinement effect is provided by a blue shift in the absorption spectrum and the increased band gap of 1.95eV with respect to bulk PbS. The current-voltage characteristics of the hybrid and pristine 6PcH2 films, both in a sandwich configuration with the aluminium top electrode, exhibit bistable switching type hysteresis. The on-off ratio of the nanocomposite device is at least three orders of magnitude higher than that for 6PcH2 organic films, while both devices operate at a very low bias voltage of 0.5V. The inclusion of the PbS QDs into the 6PcH2 film enhances the conductivity by nearly two orders of magnitude over that of comparable pristine 6PcH2 film due to the formation of a charge transfer complex with PbS QDs and 6PcH2 acting as acceptors and donors of electrons, respectively.

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Section: Bistable Electrical Behaviourcontrasting

confidence: 41%

Hybrid phthalocyanine/lead sulphide nanocomposite for bistable memory switches

Khozaee

Sosa‐Vargas

Cammidge

et al. 2015

Mater. Res. Express

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show abstract

“…A simple ZnO nanostructure, nanoparticles or nano-powder, 75 has been successfully applied in organic optoelectronics due to 76 their excellent optical, electrical, mechanical and chemical proper-77 ties [17,18]. For organic memory application, some studies con- [19,20]. However, studies on the electrical bistabilities, the mem- been reported yet.…”

mentioning

confidence: 97%

Nonvolatile memory and opto-electrical characteristics of organic memory devices with zinc oxide nanoparticles embedded in the tris(8-hydroxyquinolinato)aluminum light-emitting layer

Kao

Liu

2015

Organic Electronics

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“…19 The detailed formation process of the core-shell CIS-ZnS QD solution is described elsewhere. 20,21 After the synthesis of the CIS core solution was finished, the synthesized solution was in-situ cooled at room temperature to form the ZnS shell.…”

mentioning

confidence: 99%