Naphthalene diimide self-assembled ribbons with high electrical conductivity and mobility without doping

Kumari, Neelam; Naqvi, Samya; Kumar, Rachana

doi:10.1007/s10853-017-1829-4

Cited by 21 publications

(15 citation statements)

References 52 publications

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“…The highest conductivity of NO 2 P-PDI and DPM-PDI observed at 100 °C was ∼5 × 10 –4 and 1 × 10 –4 S m –1 , respectively, while i PrP-PDI and PFP-PDI showed highest conductivity of ∼0.64 × 10 –4 and 3.3 × 10 –4 S m –1 , respectively, at 120 °C, which are very impressive among the rylene-diimides without additives. 46,48 At high temperatures, the electron transport is facilitated by providing thermal energy to overcome the energy barrier due to disorders. In the present study also, the increase in temperature facilitates the electron transport as also observed earlier for symmetric columnar PDIs.…”

Section: Resultsmentioning

confidence: 99%

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Facile Synthesis and Evaluation of Electron Transport and Photophysical Properties of Photoluminescent PDI Derivatives

Naqvi

Kumar

2019

ACS Omega

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Perylenediimides (PDIs) have emerged as potential materials for optoelectronic applications. In the current work, four PDI derivatives, substituted at imide nitrogen with 2,6-diisopropyl phenyl, 2-nitrophenyl, diphenylmethylene, and pentafluorophenyl groups, have been synthesized from perylene 3,4,9,10-tetracarboxylic dianhydride using a facile imidization synthesis process. PDI derivatives have been spectroscopically characterized for their structure and optical properties. Temperature-variable absorption and emission spectroscopy study confirmed the H-aggregation property. H-aggregation along with strong emission suggests the slipped π–π stacking of PDI molecules. Electrochemical analysis was performed for their redox behavior and calculation of lowest unoccupied molecular orbital and highest occupied molecular orbital energy levels. Scanning electron microscopy showed the formation of ordered structures. The PDI derivatives showed excellent electron conductivity without doping and 5–10× higher electron mobility than that of state-of-the-art fullerene acceptor phenyl-C61-butyric acid methyl ester (PC61BM). Finally, the charge generation and charge transfer phenomenon was studied by transient absorption spectroscopy (TAS). TAS showed ultrafast charge transfer from the poly(3-hexyl)thiophene (P3HT) donor polymer to PDI and formation of long-lived charge-separated states similar to fullerene derivative PC61BM/P3HT blends. Such PDI derivatives with excellent solubility and photophysical and electronic properties are potential n-type materials to be used in organic electronic devices.

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Section: Resultsmentioning

confidence: 99%

“…Electron-only devices were fabricated as described earlier. 46,49,50 Ultrafast transient absorption spectroscopy was performed using optical pulse from a Ti:sapphire laser amplifier (35 fs, 4 mJ/pulse, 1 kHz, 800 nm). A beam splitter was used to split the pulse into two beams.…”

Section: Experimental Sectionmentioning

confidence: 99%

Facile Synthesis and Evaluation of Electron Transport and Photophysical Properties of Photoluminescent PDI Derivatives

Naqvi

Kumar

2019

ACS Omega

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“…The upturn region of ZnO is usually controlled by the composition and heat treatment through doping and charge transfer during sintering at high temperatures [ 1 , 2 , 12 ]. Therefore, ZnO with low amount of additives has been early used as surge protecting element in the circuits of power transmissions as a varistor to avoid the high voltage overloads through controlling their nonlinear coefficient ( α ) and breakdown field (E B ) up to 80 and 5000 V/cm, respectively [ 13 – 15 ].…”

Section: Introductionmentioning

confidence: 99%

Structural morphology and nonlinear behavior of pure and co-doped Zn1-x-yFexMyO varistors with (M = Cu, Ni)

et al. 2021

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We report here structural morphology and nonlinear behavior of pure and co-doped Zn 0.90-x Fe 0.1 M x O with (M = Cu, Ni and ( x = 0.00, 0.10) and (0.00 ≤ y ≤ 0.20)) at different sintering temperatures ( T s = 850 and 1000 °C). It is found that the co-doping of ZnO by (Fe + Cu) or (Fe + Ni) up to 0.30 does not deform the well-known wurtzite structure of ZnO, as well as pure and 0.1 of Fe-doped ZnO. The SEM micrographs did not show any secondary phases at the boundaries of grains as compared to ZnO, the average grain size is decreased for Fe and (Fe + Cu) samples, while it is increased for (Fe + Ni) samples. The nonlinear coefficient α and breakdown field E B are generally increased by 0.1 of Fe addition, but they are shifted to lower values as T s increases for all samples. Furthermore, they are gradually increased/decreased to higher/lower values for (Fe + Cu/Fe + Ni) samples up to 0.30 of co-doping content. The values of α and E B are increased from 30.06, 2115.38 V/cm for ZnO at 850 °C to 50.07, 5012 V/cm by (0.1Fe + 0.2Cu) co-doping, and from 23.53, 1956.52 V/cm to 45.58, 4750 V/cm at 1000 °C, while they are, respectively, decreased by (0.1Fe + 0.2Ni) to 13.19, 312 V/cm and 11.85, 172.42 V/cm. Similar behavior was generally obtained for nonlinear conductivity σ L and height of potential barrier φ B , whereas the vice is versa for the behavior of leakage current J k and residual voltage K r . Our results are discussed in terms of the comparative participation between the effects of co-doping of (Fe + Cu) and (Fe + Ni) to ZnO for supporting the potential barrier as compared to individual doping by Fe, Cu and Ni. This study perhaps recommended these samples for optoelectronic and ferromagnetic investigation after COVID-19 is over.

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“…Banerjee et al worked on an NDI xerogel and reported a conductivity value of 10 À 6 Scm À 1 . [26][27][28]24] To construct self-assembled molecular architecture, utilizing new building blocks/linkers is still an appealing area that retains attention from the scientific community. The structures and functions of such systems are often tailored by the design of building blocks/organic linkers with specific lengths, geometries, and of course pendant functional groups.…”

Section: Introductionmentioning

confidence: 99%

“…Banerjee et al. worked on an NDI xerogel and reported a conductivity value of 10 −6 Scm −1 [26–28,24] …”

Section: Introductionmentioning

confidence: 99%

Salicylic Acid Appended Naphthalene Diimide Organic Linkers: A Systematic Investigation towards Electronic Aspects

2020

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A series of organic linkers (NDI‐1, NDI‐2, NDI‐3) constructed from electron‐deficient naphthalene diimide (NDI) ligand equipped with two terminal salicylic acid having carboxylic and hydroxyl functionality located at different positions provided NDI linkers as a structural platform with tunable properties is presented here. Evaluating the structure and functional relationship offered by prepared NDI organic linkers is a topic of interest related to the design of functionally active building blocks. In this study, synthesis and characterization of all the designed organic linkers were investigated and their photo‐physical properties along with computational studies were performed to establish a correlation between structural design, self‐assembly and intrinsic properties like electrical conductivity and so on. The hydrogen‐bonding assisted conducting properties of the linkers were presented which revealed the possible application of linkers as electro‐active building blocks.

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Naphthalene diimide self-assembled ribbons with high electrical conductivity and mobility without doping

Cited by 21 publications

References 52 publications

Facile Synthesis and Evaluation of Electron Transport and Photophysical Properties of Photoluminescent PDI Derivatives

Facile Synthesis and Evaluation of Electron Transport and Photophysical Properties of Photoluminescent PDI Derivatives

Structural morphology and nonlinear behavior of pure and co-doped Zn1-x-yFexMyO varistors with (M = Cu, Ni)

Salicylic Acid Appended Naphthalene Diimide Organic Linkers: A Systematic Investigation towards Electronic Aspects

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