Using aligned poly(3-hexylthiophene)/poly(methyl methacrylate) blend fibers to detect volatile organic compounds

Chan, Shun‐Hsiang; Lin, Tz-Feng; Wu, Ming‐Chung; Chen, Shih‐Hsuan; Su, Wei‐Fang; Lai, Chao‐Sung

doi:10.7567/jjap.57.04fm06

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…Recently, P3HT as a material for solution processed solar cells has been superseded by other polymers such as Poly[N-9'-heptadecanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)] (PCDTBT) Wong (2017); ; Park (2009); Kwak (2016) and Poly [[4,8-bis[(2-ethylhexyl) 2010; Lu (2014), as well as organic -inorganic hybrid materials such as lead perovskite ; Hu (2015); Wong (2018). However, P3HT has also shown promising potential in other applications such as organic field effect transistors Chu (2016), organic light emitting diodes Jeong (2011); Roige (2012); Kumar (2012), and vapor sensing devices Ellis (1996); Chan (2018); Im (2011). The presence of crystallinity within a P3HT thin film has a strong effect on its electronic properties and is known to improve device performance Seidler (2013); Bao (1996); .…”

Section: Introductionmentioning

confidence: 99%

In−situ monitoring Poly(3-hexylthiophene) nanowire formation and shape evolution in solution via small angle neutron scattering

Bastianini

Pérez

Hobson

et al. 2019

Solar Energy Materials and Solar Cells

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The crystallization of poly(3-hexylthiophene) (P3HT) to form nanowires has attracted considerable interest because this process significantly increases the hole mobility when compared to amorphous P3HT, leading to improved performance in photovoltaic and other organic electronic devices. However, full characterization of the crystallization self-assembly of the polymer chains in solution has not been achieved yet, due to limited use of in − situ not destructive techniques. Here, we investigate the ageing-driven formation and evolution of regioregular (rr) P3HT nanostructures in chlorobenzene solution using small angle neutron scattering (SANS) and UV-Vis spectroscopy. We have monitored how the shape of the rr-P3HT aggregates evolve. The initial states for rr-P3HT chains are the random coils, which straighten to form rods. These subsequently π-π stack to form 2D lamellae, which further stack to create nanowires. The formation of nanowires is promoted both by the length of ageing and by low temperatures (4 • C). Temperatures above > 40 • C reverse the formation of nanowires. Additionally, atomic force microscopy (AFM) and grazing incidence wide angle x-ray scattering (GIWAXS) reveal that the nanowires can be successfully aligned during deposition by off-axis spin coating. Finally, the anisotropic conductivity of the aligned rr-P3HT nanowire films is reported. This is significant for applications such as gas

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Section: Introductionmentioning

confidence: 99%

In−situ monitoring Poly(3-hexylthiophene) nanowire formation and shape evolution in solution via small angle neutron scattering

Bastianini

Pérez

Hobson

et al. 2019

Solar Energy Materials and Solar Cells

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“…The polymer solar cell with a record high efficiency of over 13% and the self-powered ultraflexible on-skin device emerge using the polythiophene derivatives as active layers. As a most representative derivative, P3HT, a well-known polymer material, has been recognized as a prototypical π-conjugated polymer material, − e.g., solar cells, field-effect transistors, piezochromic, and thermochromic sensors. − Regarding the properties of P3HT, the H-aggregate film shows interchain exciton coupling, high polaron yield, and low HOMO level, whereas the J-aggregate film exhibits long intrachain π-conjugation, long-lifetime polarons, and triplet-state formation . Thus, the preparation of pure P3HT films comprising either J-aggregates or H-aggregates has been attempted mainly by changing solvents, e.g., to a poor solvent ,,, or a good solvent. − , However, a highly purified film of a conjugated polymer has not been reported so far.…”

Section: Introductionmentioning

confidence: 99%

Ultrapure Films of Polythiophene Derivatives are Born on a Substrate by Liquid Flow

Kajiya

Saitow

2018

ACS Appl. Energy Mater.

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Almost all films of conjugated polymers are composed of mixtures of two different structures called H-or J-aggregates, which are side-by-side and head-to-tail structures, respectively, between polymer chains. The mixture of H-and J-aggregates is responsible for the mixed optical and/ or electrical properties of a conjugated polymer film. If a highly purified conjugated polymer film composed of only a single species of aggregate was obtained, its properties would enable the realization of new soft electronics, such as flexible solar cells, wearable sensors, and artificial skin. However, there have been no reports on a method to prepare such a highly purified polymer film so far. Here, we show a facile method to obtain an ultrapure 99.8% H-aggregate polymer film by dropping a solution of poly(3-hexylthiophene) (P3HT) on a substrate at room temperature, inspired by the coffee-ring effect. According to contact angle measurements, photoluminescence and Raman spectroscopy, and X-ray diffraction, a critical step for achieving the ultrapure H-aggregate film was a two-step drying process of the polymer solution droplet on a specific substrate. The pinning of the droplet caused this drying process and yielded a flow-induced extension of the P3HT chains on the substrate, followed by the formation of ultrapure H-aggregates. We also found a 6-fold enhancement in carrier density using the ultrapure (99.8%) H-aggregate P3HT film. Furthermore, five conjugated polymers of polythiophene derivatives, used as state-of-the-art polymer solar cells, revealed the same trends to ultrapure H-aggregates, whose structure enhances performance of solar cell. The proposed method could provide a new approach to make solution-processable films for next-generation soft and flexible electronics.

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Doping Induced Transition from Space-Charge-Limited to Ohmic Conduction in P3HT-PMMA

Mandal,

Menon

2023

J. Electron. Mater.

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Using aligned poly(3-hexylthiophene)/poly(methyl methacrylate) blend fibers to detect volatile organic compounds

Cited by 4 publications

References 26 publications

In−situ monitoring Poly(3-hexylthiophene) nanowire formation and shape evolution in solution via small angle neutron scattering

In−situ monitoring Poly(3-hexylthiophene) nanowire formation and shape evolution in solution via small angle neutron scattering

Ultrapure Films of Polythiophene Derivatives are Born on a Substrate by Liquid Flow

Doping Induced Transition from Space-Charge-Limited to Ohmic Conduction in P3HT-PMMA

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