Charge Carrier Transport in Liquid Crystalline Semiconductors

Hanna, Jun‐ichi

doi:10.1007/978-90-481-2873-0_2

Cited by 8 publications

(4 citation statements)

References 60 publications

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“…In general, liquid crystals with low oxidation (reduction) potentials can be doped with electron acceptors (donors) to increase electronic conductivity (50). Rod-like molecules like the ones mentioned above are generally electronically insulating and only show electronic conduction only under very high purity (51).…”

Section: Lc Electrolyte Design Considerationsmentioning

confidence: 99%

Design rules for liquid crystalline electrolytes for enabling dendrite-free lithium metal batteries

Ahmad

Hong

Viswanathan

2020

Proc. Natl. Acad. Sci. U.S.A.

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Dendrite-free electrodeposition of lithium metal is necessary for the adoption of high energy-density rechargeable lithium metal batteries. Here, we demonstrate a mechanism of using a liquid crystalline electrolyte to suppress dendrite growth with a lithium metal anode. A nematic liquid crystalline electrolyte modifies the kinetics of electrodeposition by introducing additional overpotential due to its bulk-distortion and anchoring free energy. By extending the phase-field model, we simulate the morphological evolution of the metal anode and explore the role of bulk-distortion and anchoring strengths on the electrodeposition process. We find that adsorption energy of liquid crystalline molecules on a lithium surface can be a good descriptor for the anchoring energy and obtain it using first-principles density functional theory calculations. Unlike other extrinsic mechanisms, we find that liquid crystals with high anchoring strengths can ensure smooth electrodeposition of lithium metal, thus paving the way for practical applications in rechargeable batteries based on metal anodes.

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Section: Lc Electrolyte Design Considerationsmentioning

confidence: 99%

Design rules for liquid crystalline electrolytes for enabling dendrite-free lithium metal batteries

Ahmad

Hong

Viswanathan

2020

Proc. Natl. Acad. Sci. U.S.A.

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“…In the considered example, the screening electric field compensates for the applied electric field in less than 2 s, resulting in the substantial alteration of the liquid crystal performance. An extensive discussion of the ion-related phenomena in liquid crystals are beyond the scope of this paper, and readers are referred to the original publications [9][10][11][12][13][14][15][16][17][18][19][20][21][22] and references therein] for more details. …”

Section: Ions In Liquid Crystalsmentioning

confidence: 99%

“…In this manuscript, we will review how nanotechnology can contribute to the solution for the difficulties stemming from liquid crystal contamination. We will focus on molecular liquid crystals characterized by ionic conductivity; liquid crystals exhibiting electronic conductivity are beyond the scope of this manuscript, and we refer interested readers to the available literature [20][21][22] for more details. In addition, we would like to mention materials called ionic liquid crystals [23,24].…”

Section: Introductionmentioning

confidence: 99%

Nano-Objects and Ions in Liquid Crystals: Ion Trapping Effect and Related Phenomena

2015

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Abstract:The presence of ions in liquid crystals is one of the grand challenges that hinder the application of liquid crystals in various devices, which include advanced 3-D and flexible displays, tunable lenses, etc. Not only do they compromise the overall performance of liquid crystal devices, ions are also responsible for slow response, image sticking, and image flickering, as well as many other negative effects. Even highly purified liquid crystal materials can get contaminated during the manufacturing process. Moreover, liquid crystals can degrade over time and generate ions. All of these factors raise the bar for their quality control, and increase the manufacturing cost of liquid crystal products. A decade of dedicated research has paved the way to the solution of the issues mentioned above through merging liquid crystals and nanotechnology. Nano-objects (guests) that are embedded in the liquid crystals (hosts) can trap ions, which decreases the ion concentration and electrical conductivity, and improves the electro-optical response of the host. In this paper, we (i) review recently published works reporting the effects of nanoscale dopants on the electrical properties of liquid crystals; and (ii) identify the most promising inorganic and organic nanomaterials suitable to capture ions in liquid crystals.

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“…Inherent charge transport mobilities up to 0.71 cm 2 ·V ‒1 ·s ‒1 along the columns have recently been observed [ 15 , 16 , 17 , 18 ]. The high charge carrier mobility is the crucial factor in organic semiconducting materials for device applications and accordingly this topic has been covered in many articles, e.g., [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Discotic Liquid Crystal-Assisted Nanoparticles

Gowda

Kumar

2018

Materials

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This article primarily summarizes recent advancement in the field of discotic liquid crystal (DLC) nanocomposites. Discotic liquid crystals are nanostructured materials, usually 2 to 6 nm size and have been recognized as organic semiconducting materials. Recently, it has been observed that the dispersion of small concentration of various functionalized zero-, one- and two-dimensional nanomaterials in the supramolecular order of mesophases of DLCs imparts negligible impact on liquid crystalline properties but enhances their thermal, supramolecular and electronic properties. Synthesis, characterization and dispersion of various nanoparticles in different discotics are presented.

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Charge Carrier Transport in Liquid Crystalline Semiconductors

Cited by 8 publications

References 60 publications

Design rules for liquid crystalline electrolytes for enabling dendrite-free lithium metal batteries

Design rules for liquid crystalline electrolytes for enabling dendrite-free lithium metal batteries

Nano-Objects and Ions in Liquid Crystals: Ion Trapping Effect and Related Phenomena

Recent Advances in Discotic Liquid Crystal-Assisted Nanoparticles

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