Study of the influences of molecular planarity and aluminum evaporation rate on the performances of electrical memory devices

Hong-zhang, Liu; Bo, Rongcheng; Liu, Haifeng; Li, Najun; Xu, Qingfeng; Li, Hua; Lu, Jianmei; Wang, Lihua

doi:10.1039/c4tc00311j

Cited by 53 publications

(48 citation statements)

References 55 publications

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“…Recently, researchers had elucidated that partial reduction by introducing the oxygen vacancies in oxides held a chance to enhance their electric conductivity and improve the electrochemical and catalytic performance . For example, annealing in hydrogen atmosphere was reported as an effective way to create oxygen defects for TiO 2 and other oxides . However, this high temperature hydrogen treatment method is not practical for energy application due to the cost and safety issues.…”

Section: Introductionmentioning

confidence: 99%

Microwave Combustion for Modification of Transition Metal Oxides

Wan

Gao

et al. 2016

Adv Funct Materials

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The introduction of oxygen vacancy for transition metal oxide is an effective method to tune their conductivity. Here, microwave combustion method is used to quickly synthesize reduced metal oxides and graphene hybrid composite in several minutes. Among these as-synthesized composites, the reduced orthorhombic Nb 2 O 5 and graphene oxide (rNb 2 O 5 /rGO) composite demonstrates great electrochemical performance with a reversible specifi c capacity of 726.2 C g −1 at 2 mV s −1 in organic electrolyte as well as a good capacity retention of 87% after 3000 cycles at 10 A g −1 . It is believed that this strategy can be a common route to quickly produce oxygen vacancy in oxides and satisfy much more application requirements even for the possibility of industrialization.

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Section: Introductionmentioning

confidence: 99%

Microwave Combustion for Modification of Transition Metal Oxides

Wan

Gao

et al. 2016

Adv Funct Materials

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“…With E g values, HOMO and LUMO energy levels can be estimated using onset oxidation potentials for the sample (onset E ox ) in cyclic voltammograms using equations and

E_{HOMO} = - ([], E_{ox} + 4.8 - E_{ferrocene})

E_{LOMO} = E_{HOMO} + E_{g}

…”

Section: Resultsmentioning

confidence: 99%

2‐[(4‐Aminobutyl)ferrocenylmethylidene]‐5,6‐dimethoxy‐1‐indanone derivatives: Synthesis, characterization, and investigation of electro‐optical properties

Rahimpour

Shafagh‐Azar

Abbasi

et al. 2020

Applied Organom Chemis

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A ferrocenyl‐based, chromophore‐containing 1‐indanone derivative was synthesized through crotonic condensation between 4‐chlorobutylferrocenecarboxaldehyde and 5,6‐dimethoxy‐1‐indanone followed by the nucleophilic substitution of chlorine atom of the obtained dyad with different aromatic and aliphatic amines. The electrochemical and optical properties of the synthesized compounds were investigated to explore the relationship between their structures and optical and electrochemical properties. The bandgaps determined from optical absorption spectra ranged from 2.05 to 2.15 eV. The important electrochemical parameters, including the peak potential separation, peak current ratios, and the dependence of peak currents on the scan rate, were studied. Results showed an electrochemically reversible redox system with diffusion‐controlled redox process for the synthesized compounds. The study of quantum chemistry was performed on the synthesized compounds using the density functional theory approach. The B3LYP method and 6‐311 G(d) basis set were used for optimizing the structures in the gas phase. The theoretical and experimental results show that these compounds can be considered as candidates to be used in optical applications.

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“…The results exhibit flat and smooth surface of the polymer films with low roughness of 0.74, 1.29, 0.80, and 0.76 nm for BTDA‐HBPI‐Fc, BPDA‐HBPI‐Fc, ODPA‐HBPI‐Fc, and BDDE‐HBPI‐Fc, respectively. This faultless surface morphology can not only facilitate the hole injection process, but also prevent the permeation of Al into the film during the vacuum deposition of Al electrode …”

Section: Resultsmentioning

confidence: 99%

Nonvolatile resistive memory devices based on ferrocene‐terminated hyperbranched polyimide derived from different dianhydrides

Tan

Song

et al. 2017

J. Polym. Sci. Part A: Polym. Chem.

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A series of ferrocene‐terminated hyperbranched polyimides (HBPI‐Fcs) were synthesized from a tetra‐amine, bis(4‐(3,5‐bis (4‐amino‐2‐(trifluoromethyl) phenoxy) phenoxy) phenyl) methanon, and various dianhydrides, followed by termination with (4‐amino) phenyl ferrocene. All the HBPI‐Fcs possessed good organo‐solubility and high thermal stability. The devices based on HBPI‐Fcs exhibited bipolar and nonvolatile write‐once‐read‐many times (WORM) memory performance with various threshold voltages and the same ON/OFF current ratio of 104. Moreover, the devices possessed excellent bistability under a constant bias of −1.00 V during a test period of 104 s. The different charge trapping ability of the electron‐accepting moiety endowed the devices with different the threshold voltages. Mechanism analysis showed that the switching behavior was dominated by the charge trapping effect and the charge transfer was well fitted with the space‐current‐limited‐current (SCLC) and ohmic model. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 505–513

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Study of the influences of molecular planarity and aluminum evaporation rate on the performances of electrical memory devices

Abstract: We achieve different storage types by increasing the rate of evaporation of aluminum for the device based on TPA-BT, which has poor planarity.

Cited by 53 publications

References 55 publications

Microwave Combustion for Modification of Transition Metal Oxides

Microwave Combustion for Modification of Transition Metal Oxides

2‐[(4‐Aminobutyl)ferrocenylmethylidene]‐5,6‐dimethoxy‐1‐indanone derivatives: Synthesis, characterization, and investigation of electro‐optical properties

Nonvolatile resistive memory devices based on ferrocene‐terminated hyperbranched polyimide derived from different dianhydrides

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