Thermochromic and solvatochromic effects in poly(3-hexylthiophene)

Inganäs, Olle; Salaneck, W. R.; Österholm, J.‐E.; Laakso, J.

doi:10.1016/0379-6779(88)90110-5

Cited by 482 publications

(203 citation statements)

References 19 publications

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“…For conducting polymers, changes in the relative orientation of aromatic rings and/or overall backbone confi guration with temperature, are commonly observed [1][2][3][4]. Such structural changes lead to reduced π-π intermolecular interactions and/or create defects that can have a profound effect on conductivity and π-band localization in the highest occupied molecular orbitals.…”

Section: Introductionmentioning

confidence: 99%

“…Head-to-tail regioregular (98.5%) poly(3-hexylthiophene-2,5-diyl) (RR-P3HT) was one of the fi rst aromatic polymers found to exhibit a temperature dependent change in optical absorption and metallicity due to changes in backbone geometry (i.e., thermochromism [1,2,6]). Unfortunately, models of thermochromism have never deeply considered the role of defects other than those introduced by structural distortions.…”

Section: Introductionmentioning

confidence: 99%

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Defect contributions to conductivity in poly(3‐hexylthiophene)?

Caruso

Feng

Losovyj

et al. 2006

Physica Status Solidi (b)

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We fi nd evidence for a gradual change in the electronic properties of spin coated poly(3-hexylthiophene) thin fi lms with temperature. The conduction properties appears to be mediated by hopping conduction dominated by a low density of defects states within the highest occupied molecular orbital to lowest unoc cupied molecular orbital gap, not by a change in band gap. The photoemission and transport measure ments indicate a loss of charge mobility or carrier concentration occurs with decreasing temperature, while the molecular confi guration (through chain conjugation) also changes with temperature. The defects states identifi ed by photoemission (-1.7 eV) as well as others contributing to the transport properties are believed to be very heterogeneous along the polymer backbone.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Defect contributions to conductivity in poly(3‐hexylthiophene)?

Caruso

Feng

Losovyj

et al. 2006

Physica Status Solidi (b)

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show abstract

“…5, a). The shift of the π-π* transition absorption peaks to higher energy indicates an increasing density of conformational defects, equivalent to non-planarity, and causes loss in conjugation (Hotta et al, 1987;Inganäs et al, 1988). The observed red-shift of the absorption maximum in chlorobenzene deposited layers indicates a better crystallinity of P3HT.…”

Section: Inks and Solventsmentioning

confidence: 80%

Organic Photovoltaics: Technologies and Manufacturing

Galagan¹,

Andriessen²

2012

Third Generation Photovoltaics

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“…2), as expected for poly(3-alkylthiophenes). 16 The absorption spectrum of the P3TOT film shows no vibronic structure and a less pronounced bathochromic shift.…”

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confidence: 97%

Side chain engineering of poly-thiophene and its impact on crystalline silicon based hybrid solar cells

Zellmeier

Rappich

Klaus

et al. 2015

Applied Physics Letters

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The influence of ether groups in the side chain of spin coated regioregular polythiophene derivatives on the polymer layer formation and the hybrid solar cellproperties was investigated using electrical, optical, and X-ray diffraction experiments. The polymer layers are of high crystallinity but the polymer with 3 ether groups in the side chain (P3TOT) did not show any vibrational fine structure in the UV-Vis spectrum. The presence of ether groups in the side chains leads to better adhesion resulting in thinner and more homogeneous polymer layers. This, in turn, enhances the electronic properties of the planar c-Si/poly-thiophene hybrid solar cell. We find that the power conversion efficiency increases with the number of ether groups in the side chains, and a maximum power conversion efficiency of η = 9.6% is achieved even in simple planar structures

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Thermochromic and solvatochromic effects in poly(3-hexylthiophene)

Cited by 482 publications

References 19 publications

Defect contributions to conductivity in poly(3‐hexylthiophene)?

Defect contributions to conductivity in poly(3‐hexylthiophene)?

Organic Photovoltaics: Technologies and Manufacturing

Side chain engineering of poly-thiophene and its impact on crystalline silicon based hybrid solar cells

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