Bulk heterojunction solar cells based on self-assembling disc-shaped liquid crystalline material

Bajpai, Manisha; Yadav, Neelam; Kumar, Sandeep; Srivastava, Ritu; Dhar, Ravindra

doi:10.1080/02678292.2015.1108466

Cited by 11 publications

(8 citation statements)

References 40 publications

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“…A review of the results obtained using DLC in the field of OSC can be found in reference [ 219 ], while the newest results will be presented here. Bajpai and coworkers studied how the presence of a layer of the 2,3,6,7,10,11-hexabutyloxytriphenylene mesogen can influence the performance of the classic bulk-heterojunction OSC formed by poly (3-hexylthiophene) and [ 6 , 6 ]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM) [ 220 , 221 ]. They added the DLC layer between the hole extracting layer and the bulk heterojunction, studying the effect on two different devices ( Figure 35 ): in the first one, PEDOT:PSS was used as hole acceptor, while in the second one the hole acceptor was MoO 3 .…”

Section: Recent Advances In the Study Of Discotic Liquid Crystalsmentioning

confidence: 99%

Charge Mobility in Discotic Liquid Crystals

Termine

Golemme

2021

IJMS

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Discotic (disk-shaped) molecules or molecular aggregates may form, within a certain temperature range, partially ordered phases, known as discotic liquid crystals, which have been extensively studied in the recent past. On the one hand, this interest was prompted by the fact that they represent models for testing energy and charge transport theories in organic materials. However, their long-range self-assembling properties, potential low cost, ease of processability with a variety of solvents and the relative ease of tailoring their properties via chemical synthesis, drove the attention of researchers also towards the exploitation of their semiconducting properties in organic electronic devices. This review covers recent research on the charge transport properties of discotic mesophases, starting with an introduction to their phase structure, followed by an overview of the models used to describe charge mobility in organic substances in general and in these systems in particular, and by the description of the techniques most commonly used to measure their charge mobility. The reader already familiar or not interested in such details can easily skip these sections and refer to the core section of this work, focusing on the most recent and significant results regarding charge mobility in discotic liquid crystals.

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Section: Recent Advances In the Study Of Discotic Liquid Crystalsmentioning

confidence: 99%

Charge Mobility in Discotic Liquid Crystals

Termine

Golemme

2021

IJMS

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“…[16][17][18] The impact of symmetrical cells lled with liquid crystal (LC) compounds has been previously investigated. [19][20][21] In order to enhance the ion conductivity of engineered materials, they should be incorporated with a liquid crystalline derivative. 22 The smectic ordering of liquid crystals, including ion-conductive tails, results in phases with alternating ion conductive/insulating layers.…”

Section: Introductionmentioning

confidence: 99%

Novel sulphonic acid liquid crystal derivatives: experimental, computational and optoelectrical characterizations

et al. 2021

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“…Bajpai et al [119] investigated the effect of addition of disc-shaped liquid crystalline material 29 (Scheme 4.11) in P3HT:PCBM bulk heterojunction solar cells. A schematic representation of the device structure is shown in Fig.…”

Section: Liquid Crystalline Triphenylenes In Opvmentioning

confidence: 99%

Discotic Liquid Crystals for Self-organizing Photovoltaics

Bisoyi

2016

NanoScience and Technology

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Development of photovoltaic solar cells using organic materials as active components is an emerging area of contemporary research endeavor toward sustainable energy harvesting. Among the organic optoelectronic materials, disc-shaped polycyclic aromatic compounds capable of exhibiting columnar liquid crystal (LC) properties are unique. Liquid crystalline materials simultaneously display the anisotropic properties of crystalline solids and flow properties of isotropic liquids. The order and dynamics of the molecules of liquid crystalline materials make them stimuli responsive smart soft materials. LCs are ubiquitous in our daily life as the active switching materials in flat panel display such as the screens of laptops, computers, cameras and mobile phones. Interestingly, the nematic LC phase of disc-like molecules has been used to fabricate optical compensation films which enable enlarging the viewing angle of LC display devices. However the columnar LC phase of disc-like compounds has been found to possess remarkable semiconducting properties. Like other LCs, they show promising characteristics such as controllable alignment and self-healing of structural defects which render them appealing candidates for use in organic semiconducting devices. In this chapter, we present the state-of-the-art of organic photovoltaics employing discotic LCs as active components as well as facilitating additives in the active layer of photovoltaic devices. Various discotic cores such as phthalocyanine, porphyrin, hexabenzocoronene, triphenylene, perylene diimide and others with different electronic properties have been used in organic photovoltaics. The discotic LCs act as electron and/or hole transporting materials in the active layer, which have been tested both in bilayer and bulk heterojunction device configurations. Though this research enterprise is in early stage, with adequate attention these fascinating self-organizing materials could contribute toward the sustainable energy harvesting from solar radiation in future.

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Bulk heterojunction solar cells based on self-assembling disc-shaped liquid crystalline material

Cited by 11 publications

References 40 publications

Charge Mobility in Discotic Liquid Crystals

Charge Mobility in Discotic Liquid Crystals

Novel sulphonic acid liquid crystal derivatives: experimental, computational and optoelectrical characterizations

Discotic Liquid Crystals for Self-organizing Photovoltaics

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