Optical and electrical properties of nanostructured N,N′-diphenyl-N,N′-di-p-tolylbenzene-1,4-diamine organic thin films

Elghandour, Ahmed H.; Hameed, Mohamed Farhat O.; Awed, A. S.; Obayya, S. S. A.

doi:10.1007/s00339-018-1966-x

Cited by 17 publications

(4 citation statements)

References 45 publications

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“…The small molecules considered here are N , N ′-diphenyl- N , N ′-di- p -tolylbenzene-1,4-diamine (MPDA), which has been shown to act as a hole transport layer when prepared as neat films, − and 4-anilinotriphenylamine (PATPA), which has been used as a precursor in arylamine oligomer synthesis . Blends of these small molecules in PS enhance the hole-trapping ability of the dielectric layer.…”

Section: Introductionmentioning

confidence: 99%

Charge Trapping in Polymer Electrets with Highly Dilute Blended Arylamine Donors

Plunkett

Zhang

Katz

et al. 2021

ACS Appl. Electron. Mater.

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The nature of and the ability to control biasing across dielectrics is a key area of research for the design of more versatile organic field-effect transistors (OFETs). One important technique to achieve such control is the inclusion of donor or acceptor molecules in the dielectric to modulate charge trapping therein. In this work, we report the effects of the additive concentration on OFETs with two different arylamines blended in polystyrene (PS) dielectrics, N,N′-diphenyl-N,N′-di-ptolylbenzene-1,4-diamine (MPDA) and 4-anilinotriphenylamine (PATPA), as well as a comparison between PATPA/PS blends and dielectrics where PATPA was chemically tethered to the PS matrix. Dielectrics included in OFETs were subject to charging, and their charging capacity and stability were extracted from the OFET threshold voltages. For both MPDA/PS and PATPA/PS, blends with additive mole fractions as low as χ = 3 × 10 −4 were sufficient to cause increases in the charge trapping relative to pure PS dielectrics. We observed a pronounced inverse relationship between the capacity and stability of blended systems at larger mole fractions (χ = 10 −2 ) where the interadditive molecule distances became comparable to their size (∼1 nm). Differences between MPDA and PATPA behaviors were consistent with their different structures and sizes. Furthermore, we found a small effect on electronic trapping arising from the chemical tethering of PATPA to the PS matrix. This result was consistent with the changes made to the additive during the tethering process and small compared to the observed differences arising from the concentration. These results suggest that the average intermolecular separation is a key determinant of charge storage stability in blended dielectrics.

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Section: Introductionmentioning

confidence: 99%

Charge Trapping in Polymer Electrets with Highly Dilute Blended Arylamine Donors

Plunkett

Zhang

Katz

et al. 2021

ACS Appl. Electron. Mater.

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“…El-ghamdour A et al [10] investigated on the Optical and electrical properties of nanostructured organic thin films of N,N′diphenyl-N,N′-di-p-tolylbenzene-1,4-diamine and the possibility of using it as a hole transport layer in optoelectronic devices [10]. Mendoza-Ruiz et al [11] reported the thermal and thermochemical capabilities of two OLED compounds, Tetra-N-phenylbenzidine and 4,4´-Bis (N-carbazolyl)-1, assessing 1´-biphenyl using DSC and semi-micro combustion calorimetry.…”

Section: IVmentioning

confidence: 99%

Thermal Stability of Hole Transport Material Organics: Carbazoles and Phenyl Benzidines

Mentado-Morales¹

2022

PSPRJ

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“…π-Conjugated organic molecules have been widely investigated by researchers in chemistry, physics and materials science due to their abundant photoelectronic and conductive properties. 1,2 Their tunable architecture and electronic properties via chemical modifications result in diverse applications, such as organic field-effect transistors (OFETs), 3 organic light-emitting diodes (OLEDs), 4–8 organic solar cells (OSCs), 9 blue fluorescent emitters 10–12 and “hot exciton” thermally activated delayed fluorescence (TADF) molecules. 13 Recently, twistacenes, a series of very large π-conjugated molecules with a twisted conformation, which is helpful in reducing aggregation in crystals, improving solubility, stabilizing radicals and gaining chirality, 14 have been reported as promising organic photonic materials.…”

Section: Introductionmentioning

confidence: 99%

“Hot exciton” fluorescence and charge transport of fine-tuned twistacenes: theoretical study on substitution effect and intermolecular interactions

et al. 2023

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Optical and electrical properties of nanostructured N,N′-diphenyl-N,N′-di-p-tolylbenzene-1,4-diamine organic thin films

Cited by 17 publications

References 45 publications

Charge Trapping in Polymer Electrets with Highly Dilute Blended Arylamine Donors

Charge Trapping in Polymer Electrets with Highly Dilute Blended Arylamine Donors

Thermal Stability of Hole Transport Material Organics: Carbazoles and Phenyl Benzidines

“Hot exciton” fluorescence and charge transport of fine-tuned twistacenes: theoretical study on substitution effect and intermolecular interactions

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