Chain configuration of poly(3-hexylthiophene) as revealed by detailed X-ray diffraction studies

Mårdalen, Jostein; Samuelsen, Emil J.; Gautun, Odd R.; Carlsen, Per H. J.

doi:10.1016/0038-1098(91)90745-h

Cited by 57 publications

(34 citation statements)

References 6 publications

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“…Iron residues of some 0.4 mol % were in fact detected by energy dispersive X-ray analysis (EDAX) [12]. If it is assumed that each Fe atom is contained in a species that is electrically active as an accept•r, then the concentration of accep-4 x 10 -3 pNAv acceptors per cm-3 = (9) Mw where p is the density of P3HT (1.10gem -3 [20]), NAy is Avogadro's number and Mw is the relative molecular mass of the monomer unit. This value is 107 times larger than the impurity concentration calculated from the C-V characteristic.…”

Section: Resultsmentioning

confidence: 99%

Poly(3-hexylthiophene)-zinc oxide rectifying junctions

Marchant

Foot

1995

J Mater Sci: Mater Electron

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The rectifying junction formed at the interface of solvent-cast, as-prepared poly(3-hexylthiophene) (P3HT) and conductive ZnO-coated glass was investigated by recording the /-Vand C-Vcharacteristics. The data have been discussed in terms of the Schottky thermionic-emission current transport model. The diode "quality factor" determined for these devices was 3.6, and indicated imperfect model fitting. The Schottky barrier was estimated as 0.93 eV. A negative differential resistance regime was observed for P3HT/ZnO devices under reverse-bias high-field conditions. This effect was concluded to be a filament-formation burnout failure process.

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Section: Resultsmentioning

confidence: 99%

Poly(3-hexylthiophene)-zinc oxide rectifying junctions

Marchant

Foot

1995

J Mater Sci: Mater Electron

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“…This probably explains why pBTTT has better performances [102,103]. According to the work of Alberga et al [53], spin-coated then annealed P3HT displays three different zones: an interfacial zone close to the substrate (thickness of 10 Å), an intermediate zone 30 Å thick atop and an OSC/electrolyte interfacial zone over this distance; the first layers display the highest degree of order [53,[87][88][89].…”

Section: Poly(25-bis(3-alkylthiophen-2-yl)thieno[32-b]-thiophene) (mentioning

confidence: 98%

“…It has also been shown that the hole mobility varies by two orders of magnitude depending on orientation (parallel or normal to the substrate) of the lamellae [53,54,[81][82][83][84][85][86], the normal one giving the highest mobility. According to the work of Alberga et al [53], spin-coated then annealed P3HT displays three different zones: an interfacial zone close to the substrate (thickness of 10 Å), an intermediate zone 30 Å thick atop and an OSC/electrolyte interfacial zone over this distance; the first layers display the highest degree of order [53,[87][88][89].…”

Section: Poly(3-hexylthiophene) (P3ht)mentioning

confidence: 99%

Electrolytic Gated Organic Field-Effect Transistors for Application in Biosensors—A Review

2016

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Electrolyte-gated organic field-effect transistors have emerged in the field of biosensors over the last five years, due to their attractive simplicity and high sensitivity to interfacial changes, both on the gate/electrolyte and semiconductor/electrolyte interfaces, where a target-specific bioreceptor can be immobilized. This article reviews the recent literature concerning biosensing with such transistors, gives clues to understanding the basic principles under which electrolyte-gated organic field-effect transistors work, and details the transduction mechanisms that were investigated to convert a receptor/target association into a change in drain current.

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“…The usually accepted value of the cell parameter along the conjugation direction is c ∼ 7.8 Å, but also the value c ∼ 8.3 Å has been proposed 46. For what concerns the angles between the a , b , and c cell edge directions, more often the values ${\alpha} = {\beta} = {\gamma} = {\pi} /2$ have been adopted (orthorhombic primitive cell 36), however monoclinic distortions have also been proposed 11, 14, 16, 42, 43, 47.…”

Section: Introductionmentioning

confidence: 99%

Structure and X‐ray spectrum of crystalline poly(3‐hexylthiophene) from DFT‐van der Waals calculations

Colle

Grosso

Ronzani

et al. 2011

Physica Status Solidi (b)

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The minimum-energy geometrical structure of the regioregular head-to-tail poly(3-hexylthiophene) (rr-HT-P3HT) polymer has been addressed by means of density functional theory (DFT) calculations which include long-range (van der Waals) interactions. The problem of the P3HT structure has been debated in the literature in the last decades mainly for what concerns the arrangement of the alkyl side chains of the polymer and the type and content of the crystalline primitive cell. The main result of our calculations is that the energetically favored structure of the crystalline polymer at T = 0 K corresponds to polythiophene chains with slightly (∼16°) non co-planar rings and a fishbone arrangement of tilted alkyl side chains with complex internal structure. The alkyl side chains are negligibly interdigitated with those of the adjacent polymer layers; moreover the five terminal carbon atoms of each alkyl side chain are co-planar in all-trans staggered conformation. The optimized geometrical structure obtained for the rr-HT-P3HT polymer is in agreement with measured X-ray spectra of high molecular weight P3HT crystalline samples, and confirms that two non-equivalent polymer chains, mutually shifted along the backbone axis, are contained in an orthorhombic primitive cell

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Chain configuration of poly(3-hexylthiophene) as revealed by detailed X-ray diffraction studies

Cited by 57 publications

References 6 publications

Poly(3-hexylthiophene)-zinc oxide rectifying junctions

Poly(3-hexylthiophene)-zinc oxide rectifying junctions

Electrolytic Gated Organic Field-Effect Transistors for Application in Biosensors—A Review

Structure and X‐ray spectrum of crystalline poly(3‐hexylthiophene) from DFT‐van der Waals calculations

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