Poly-(3)hexylthiophene nanowire networks for versatile fabrication of bulk heterojunctions with increased active volume

Kramer, Theodore J.; Chew, Annabel R.; Schiros, Theanne; Kymissis, Ioannis; Herman, Irving P.

doi:10.1116/1.4802928

Cited by 4 publications

(5 citation statements)

References 58 publications

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“…The surface roughness values for the amorphous 20-and 40-monomer films are 2.56 Å and 4.83 Å, respectively. Experimentally measured contact angle values are in the range of 102 • to 109 • , [18,19,20,21] in good agreement with our simulation results (backbone-exposed and amorphous films). The variation in the experimentally measured contact angles is due to differences in surface morphology as a result of different film processing conditions.…”

Section: Contact Anglesupporting

confidence: 89%

“…The calculated contact angles are in agreement with experimentally measured values. [18,19,20,21] Though large differences in surface tension values (P3HT/vacuum) and contact angle values were observed between hexyl-and backbone-exposed films, their interfacial surface tension with water was found to be comparable. The water molecules' orientations on hexyl-exposed and amorphous films were similar because hexyl side chains enriched both surfaces.…”

Section: Discussionmentioning

confidence: 73%

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Interfacial and wetting properties of poly(3-hexylthiophene)–water systems

Yimer

Yang²,

Bhatta

et al. 2015

Chemical Physics Letters

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Please cite this article as: Yeneneh Y. Yimer, Brandon Yang, Ram S. Bhatta, Mesfin Tsige, Interfacial and Wetting Properties of Poly(3-hexylthiophene)-water systems, Chemical Physics Letters (2015), http://dx.A c c e p t e d M a n u s c r i p t  P3HT surfaces are hydrophobic with contact angles greater than 90 0 .  Significant differences in P3HT/vacuum surface tension between backboneexposed and hexyl-exposed films.  Comparable interfacial tension at P3HT/water interfaces.  No reorientation of the P3HT groups due to the presence of water.  Simulation results are in good agreement with existing experimental results in the literature. AbstractThe wetting behavior of water on different types of poly(3-hexylthiophene)(P3HT) surfaces is studied using molecular dynamics simulations. All the different P3HT surfaces are found to be hydrophobic with water contact angles greater than 90 • . The water contact angle on hexyl exposed crystalline P3HT films is about 20 • larger than its contact angle on backbone-exposed crystalline P3HT films. However, all the films show comparable interfacial surface energies at the P3HT/water interface. The simulation results are in very good agreement with experimentally measured water contact angles on P3HT films and also interfacial tensions.

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Section: Contact Anglesupporting

confidence: 89%

Section: Discussionmentioning

confidence: 73%

Interfacial and wetting properties of poly(3-hexylthiophene)–water systems

Yimer

Yang²,

Bhatta

et al. 2015

Chemical Physics Letters

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“…The PS in the liquid state is then solidified by producing P3HT nanowires embedded in the PS matrix. This structure is extremely efficient for maintaining percolation of the channel at low P3HT content [52][53][54][55][56]. In addition, environmental stability of OFETs was enhanced greatly, as the PS matrix protects H 2 O and O 2 molecules from ambient air.…”

Section: Embedded Semiconductor Nanowiresmentioning

confidence: 90%

Organic Semiconductor/Insulator Polymer Blends for High-Performance Organic Transistors

Lee

Park

2014

Polymers

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Abstract:We reviewed recent advances in high-performance organic field-effect transistors (OFETs) based on organic semiconductor/insulator polymer blends. Fundamental aspects of phase separation in binary blends are discussed with special attention to phase-separated microstructures. Strategies for constructing semiconductor, semiconductor/dielectric, or semiconductor/passivation layers in OFETs by blending organic semiconductors with an insulating polymer are discussed. Representative studies that utilized such blended films in the following categories are covered: vertical phase-separation, processing additives, embedded semiconductor nanowires.

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“…In the literature, there are two approaches to the formation of P3HT-nw. Several studies report that nanowire formation direction is toward to π-π stacking direction [20][21][22][23][24]. On the other hand, in a previous study, we reported that the polymer backbones are parallel to the nanowire axis [17].…”

Section: Introductionmentioning

confidence: 65%

Performance improvement of P3HT nanowire-based organic solar cells by interfacial morphology engineering

Kıymaz¹,

Kiymaz²,

Zafer³

2020

Nanotechnology

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Poly (3-hexylthiophene-2,5-diyl) nanowires (nw-P3HT) have been a great interest for organic electronics, including organic field-effect transistors, organic photodetectors, organic photovoltaics, etc due to easy formation in the solution process. Thus both explanations of charge transport dynamics and morphology are crucial for device performance. Here we demonstrated the optoelectronic properties of the P3HT nanowires where the polymer backbones were parallel to the nanowire axis. The nanowires tended to form a bundle due to van der Waals interactions. Nanowire bundles were separated by 1,8-diiodooctane (DIO) additive for photovoltaic fabrication. The bundle separation was visualized by atomic force microscopy. The charge transfer mechanism was evaluated by electrochemical impedance spectroscopy. The electrical analysis showed that short-circuit current density (J sc) increases to 10.74 mA cm−2 after the bundle separation. According to impedance analysis, there is a correlation between effective lifetime and DIO ratio. These findings were considered as promising results for improving the transport by forming pathways for charge carriers.

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Poly-(3)hexylthiophene nanowire networks for versatile fabrication of bulk heterojunctions with increased active volume

Cited by 4 publications

References 58 publications

Interfacial and wetting properties of poly(3-hexylthiophene)–water systems

Interfacial and wetting properties of poly(3-hexylthiophene)–water systems

Organic Semiconductor/Insulator Polymer Blends for High-Performance Organic Transistors

Performance improvement of P3HT nanowire-based organic solar cells by interfacial morphology engineering

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