Side-chain influence on the mass density and refractive index of polyfluorenes and star-shaped oligofluorene truxenes

Paulina O. Morawska; Yue Wang; Arvydas Ruseckas; Clara Orofino-Penia; Alexander L. Kanibolotsky; Ramkumar Santhanagopal; Nils Fröhlich; Martin Fritsch; Sybille Allard; Ullrich Scherf; Peter J. Skabara; Ifor D W Samuel; Graham A. Turnbull

doi:10.1021/acs.jpcc.5b05526

Side-chain influence on the mass density and refractive index of polyfluorenes and star-shaped oligofluorene truxenes

Paulina O. Morawska, Yue Wang, Arvydas Ruseckas, Clara Orofino-Penia, Alexander L. Kanibolotsky, Ramkumar Santhanagopal, Nils Fröhlich, Martin Fritsch, Sybille Allard, Ullrich Scherf, Peter J. Skabara, Ifor D W Samuel, Graham A. Turnbull^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

The density of organic semiconductor films is an important quantity because it is related to intermolecular spacing which in turn determines the electronic and photophysical properties. We report thin film density and refractive index measurements of polyfluorenes and star-shaped oligofluorene truxene molecules. An ellipsometer and a procedure using a spectrophotometer were used to determine film thickness and mass of spin-coated films, respectively. We present a study of the effect of alkyl side-chain length on the volumetric mass density and refractive index of the materials studied. The density measured for poly(9,9-di-n-octylfluorene) (PF8) was 0.88 ± 0.04 g/cm<sup>3</sup> and decreased with longer alkyl side chains. For the truxene molecule with butyl side chains (T3 butyl), we measured a density of 0.90 ± 0.04 g/cm<sup>3</sup>, which also decreased with increasing side-chain length.

Original language	English
Pages (from-to)	22102-22107
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	119
Issue number	38
Early online date	1 Sept 2015
DOIs	https://doi.org/10.1021/acs.jpcc.5b05526
Publication status	Published - 24 Sept 2015

Keywords

organic semiconductors
semiconductor films
thin film
thin film density
refractive index measurement

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Morawska-etal-JOPCC-2015-Side-chain-influence-on-the-mass-density-and-refractive-indexAccepted author manuscript, 700 KB

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Morawska, P. O., Wang, Y., Ruseckas, A., Orofino-Penia, C., Kanibolotsky, A. L., Santhanagopal, R., Fröhlich, N., Fritsch, M., Allard, S., Scherf, U., Skabara, P. J., Samuel, I. D. W., & Turnbull, G. A. (2015). Side-chain influence on the mass density and refractive index of polyfluorenes and star-shaped oligofluorene truxenes. Journal of Physical Chemistry C, 119(38), 22102-22107. https://doi.org/10.1021/acs.jpcc.5b05526

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title = "Side-chain influence on the mass density and refractive index of polyfluorenes and star-shaped oligofluorene truxenes",

abstract = "The density of organic semiconductor films is an important quantity because it is related to intermolecular spacing which in turn determines the electronic and photophysical properties. We report thin film density and refractive index measurements of polyfluorenes and star-shaped oligofluorene truxene molecules. An ellipsometer and a procedure using a spectrophotometer were used to determine film thickness and mass of spin-coated films, respectively. We present a study of the effect of alkyl side-chain length on the volumetric mass density and refractive index of the materials studied. The density measured for poly(9,9-di-n-octylfluorene) (PF8) was 0.88 ± 0.04 g/cm3 and decreased with longer alkyl side chains. For the truxene molecule with butyl side chains (T3 butyl), we measured a density of 0.90 ± 0.04 g/cm3, which also decreased with increasing side-chain length.",

keywords = "organic semiconductors, semiconductor films, thin film, thin film density, refractive index measurement",

author = "Morawska, {Paulina O.} and Yue Wang and Arvydas Ruseckas and Clara Orofino-Penia and Kanibolotsky, {Alexander L.} and Ramkumar Santhanagopal and Nils Fr{\"o}hlich and Martin Fritsch and Sybille Allard and Ullrich Scherf and Skabara, {Peter J.} and Samuel, {Ifor D W} and Turnbull, {Graham A.}",

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doi = "10.1021/acs.jpcc.5b05526",

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Morawska, PO, Wang, Y, Ruseckas, A, Orofino-Penia, C, Kanibolotsky, AL, Santhanagopal, R, Fröhlich, N, Fritsch, M, Allard, S, Scherf, U, Skabara, PJ, Samuel, IDW & Turnbull, GA 2015, 'Side-chain influence on the mass density and refractive index of polyfluorenes and star-shaped oligofluorene truxenes', Journal of Physical Chemistry C, vol. 119, no. 38, pp. 22102-22107. https://doi.org/10.1021/acs.jpcc.5b05526

TY - JOUR

T1 - Side-chain influence on the mass density and refractive index of polyfluorenes and star-shaped oligofluorene truxenes

AU - Morawska, Paulina O.

AU - Wang, Yue

AU - Ruseckas, Arvydas

AU - Orofino-Penia, Clara

AU - Kanibolotsky, Alexander L.

AU - Santhanagopal, Ramkumar

AU - Fröhlich, Nils

AU - Fritsch, Martin

AU - Allard, Sybille

AU - Scherf, Ullrich

AU - Skabara, Peter J.

AU - Samuel, Ifor D W

AU - Turnbull, Graham A.

PY - 2015/9/24

Y1 - 2015/9/24

N2 - The density of organic semiconductor films is an important quantity because it is related to intermolecular spacing which in turn determines the electronic and photophysical properties. We report thin film density and refractive index measurements of polyfluorenes and star-shaped oligofluorene truxene molecules. An ellipsometer and a procedure using a spectrophotometer were used to determine film thickness and mass of spin-coated films, respectively. We present a study of the effect of alkyl side-chain length on the volumetric mass density and refractive index of the materials studied. The density measured for poly(9,9-di-n-octylfluorene) (PF8) was 0.88 ± 0.04 g/cm3 and decreased with longer alkyl side chains. For the truxene molecule with butyl side chains (T3 butyl), we measured a density of 0.90 ± 0.04 g/cm3, which also decreased with increasing side-chain length.

AB - The density of organic semiconductor films is an important quantity because it is related to intermolecular spacing which in turn determines the electronic and photophysical properties. We report thin film density and refractive index measurements of polyfluorenes and star-shaped oligofluorene truxene molecules. An ellipsometer and a procedure using a spectrophotometer were used to determine film thickness and mass of spin-coated films, respectively. We present a study of the effect of alkyl side-chain length on the volumetric mass density and refractive index of the materials studied. The density measured for poly(9,9-di-n-octylfluorene) (PF8) was 0.88 ± 0.04 g/cm3 and decreased with longer alkyl side chains. For the truxene molecule with butyl side chains (T3 butyl), we measured a density of 0.90 ± 0.04 g/cm3, which also decreased with increasing side-chain length.

KW - organic semiconductors

KW - semiconductor films

KW - thin film

KW - thin film density

KW - refractive index measurement

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DO - 10.1021/acs.jpcc.5b05526

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AN - SCOPUS:84942543497

SN - 1932-7447

VL - 119

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EP - 22107

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 38

ER -

Side-chain influence on the mass density and refractive index of polyfluorenes and star-shaped oligofluorene truxenes

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