Synthesis, Photophysical and Electrochemical Characterization of the Heteroleptic Iridium Complexes with Modified Ancillary Ligand by Carrier‐transporting Groups

Liang, Aihui; Liu, Yu; Tan, Hua; Cao, Yunbo; Li, Liang; Li, Xiaoshuang; Ma, Wenjie; Zhu, Min; Zhu, Weiguo

doi:10.1002/cjoc.201190021

Cited by 7 publications

(1 citation statement)

References 25 publications

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“…The synthetic routes of α‐PBT and β‐PBT are shown in Scheme . Compounds 1 – 5 were synthesized on the basis of the methods described in the literature . The chemical structures of α‐PBT and β‐PBT were fully characterized by means of high‐resolution mass spectra (HRMS) as well as 1 H and 13 C NMR spectroscopy (see the Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Altering the Position of Phenyl Substitution to Adjust Film Morphology and Memory Device Performance

Zhou

et al. 2015

Chemistry An Asian Journal

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In this study, two structural isomers α-PBT and β-PBT, which only differ in the phenyl substituent position on the quinoline chromophore, have been designed and successfully synthesized. The influences of substituent position on the film morphology and the storage performance of the devices were investigated. Both molecules employed in the memory devices exhibited same nonvolatile binary (write-once-read-many-times; WORM) characteristics, but the switch threshold voltage (Vth) of the β-PBT-based device was clearly lower than that of the α-PBT-based device. Simulation results demonstrate that the variation of the phenyl substituent position led to different intermolecular stacking styles and thus to varied grain sizes for each film morphology. This work illustrates that altering the phenyl substituent position on the molecular backbone could improve the quality of the film morphology and reduce power consumption, which is good for the rational design of future advanced organic memory devices (OMDs).

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Section: Resultsmentioning

confidence: 99%

Altering the Position of Phenyl Substitution to Adjust Film Morphology and Memory Device Performance

Zhou

et al. 2015

Chemistry An Asian Journal

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Surface Engineering of ITO Substrates to Improve the Memory Performance of an Asymmetric Conjugated Molecule with a Side Chain

Hou

Cheng

Xiao

et al. 2017

Chemistry An Asian Journal

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Organic multilevel random resistive access memory (RRAM) devices with an electrode/organic layer/electrode sandwich-like structure suffer from poor reproducibility, such as low effective ternary device yields and a wide threshold voltage distribution, and improvements through organic material renovation are rather limited. In contrast, engineering of the electrode surfaces rather than molecule design has been demonstrated to boost the performance of organic electronics effectively. Herein, we introduce surface engineering into organic multilevel RRAMs to enhance their ternary memory performance. A new asymmetric conjugated molecule composed of phenothiazine and malononitrile with a side chain (PTZ-PTZO-CN) was fabricated in an indium tin oxide (ITO)/PTZ-PTZO-CN/Al sandwich-like memory device. Modification of the ITO substrate with a phosphonic acid (PA) prior to device fabrication increased the ternary device yield (the ratio of effective ternary device) and narrowed the threshold voltage distribution. The crystallinity analysis revealed that PTZ-PTZO-CN grown on untreated ITO crystallized into two phases. After the surface engineering of ITO, this crystalline ambiguity was eliminated and a sole crystal phase was obtained that was the same as in the powder state. The unified crystal structure and improved grain mosaicity resulted in a lower threshold voltage and, therefore, a higher ternary device yield. Our result demonstrated that PA modification also improved the memory performance of an asymmetric conjugated molecule with a side chain.

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Novel cyclometalated platinum (II) complex containing carrier-transporting groups: Synthesis, luminescence and application in single dopant white PLEDs

Liang

Zhu

et al. 2013

Dyes and Pigments

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Synthesis, Photophysical and Electrochemical Characterization of the Heteroleptic Iridium Complexes with Modified Ancillary Ligand by Carrier‐transporting Groups

Cited by 7 publications

References 25 publications

Altering the Position of Phenyl Substitution to Adjust Film Morphology and Memory Device Performance

Altering the Position of Phenyl Substitution to Adjust Film Morphology and Memory Device Performance

Surface Engineering of ITO Substrates to Improve the Memory Performance of an Asymmetric Conjugated Molecule with a Side Chain

Novel cyclometalated platinum (II) complex containing carrier-transporting groups: Synthesis, luminescence and application in single dopant white PLEDs

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