Enhancement of optical properties of poly (9,9′-di-n-octylfluorenyl- 2,7-diyl) in conjugated polymer/TiO2 nanocomposites

Bandar Ali Al-Asbahi, Mohammad Hafizuddin Jumali

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Abstract

The influence of colloidal TiO2 nanoparticle contents on the optical properties of poly (9,9′-di-n-octylfluorenyl-2,7-diyl) conjugated polymer (PFO) has been investigated. The solution blending method was used to prepare homogenous PFO/TiO2 nanocomposite. The nanocomposite films were prepared on glass substrates using the spin-coating technique. The films were divided into two groups, the first was left to dry at room temperature while the second was heat-treated at 120 °C for 1 h. Absorption and emission spectra showed that the PFO existed in α-and Β-phases morphology having monomeric, excimeric, and double excimeric states. In addition, both spectra revealed that TiO2 contents and heat treatment temperature extended the conjugation length of PFO. Finally, emission spectra for both cases exhibited decreasing in the line width of zero-phonon emission spectra and increasing in the vibronic splitting energy, upon increment of the TiO 2, led to a significant increase in π-electron delocalization and lower degree in chain disorder.

Original languageEnglish
Pages (from-to)1021-1025
Number of pages5
JournalCanadian Journal of Physics
Volume92
Issue number9
DOIs
Publication statusPublished - 2014

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nanocomposites
emission spectra
optical properties
augmentation
polymers
conjugation
coating
heat treatment
disorders
absorption spectra
heat
nanoparticles
glass
room temperature
electrons
temperature
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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title = "Enhancement of optical properties of poly (9,9′-di-n-octylfluorenyl- 2,7-diyl) in conjugated polymer/TiO2 nanocomposites",
abstract = "The influence of colloidal TiO2 nanoparticle contents on the optical properties of poly (9,9′-di-n-octylfluorenyl-2,7-diyl) conjugated polymer (PFO) has been investigated. The solution blending method was used to prepare homogenous PFO/TiO2 nanocomposite. The nanocomposite films were prepared on glass substrates using the spin-coating technique. The films were divided into two groups, the first was left to dry at room temperature while the second was heat-treated at 120 °C for 1 h. Absorption and emission spectra showed that the PFO existed in α-and Β-phases morphology having monomeric, excimeric, and double excimeric states. In addition, both spectra revealed that TiO2 contents and heat treatment temperature extended the conjugation length of PFO. Finally, emission spectra for both cases exhibited decreasing in the line width of zero-phonon emission spectra and increasing in the vibronic splitting energy, upon increment of the TiO 2, led to a significant increase in π-electron delocalization and lower degree in chain disorder.",
author = "Al-Asbahi, {Bandar Ali} and Jumali, {Mohammad Hafizuddin}",
year = "2014",
doi = "10.1139/cjp-2013-0486",
language = "English",
volume = "92",
pages = "1021--1025",
journal = "Canadian Journal of Physics",
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publisher = "National Research Council of Canada",
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AU - Al-Asbahi, Bandar Ali

AU - Jumali, Mohammad Hafizuddin

PY - 2014

Y1 - 2014

N2 - The influence of colloidal TiO2 nanoparticle contents on the optical properties of poly (9,9′-di-n-octylfluorenyl-2,7-diyl) conjugated polymer (PFO) has been investigated. The solution blending method was used to prepare homogenous PFO/TiO2 nanocomposite. The nanocomposite films were prepared on glass substrates using the spin-coating technique. The films were divided into two groups, the first was left to dry at room temperature while the second was heat-treated at 120 °C for 1 h. Absorption and emission spectra showed that the PFO existed in α-and Β-phases morphology having monomeric, excimeric, and double excimeric states. In addition, both spectra revealed that TiO2 contents and heat treatment temperature extended the conjugation length of PFO. Finally, emission spectra for both cases exhibited decreasing in the line width of zero-phonon emission spectra and increasing in the vibronic splitting energy, upon increment of the TiO 2, led to a significant increase in π-electron delocalization and lower degree in chain disorder.

AB - The influence of colloidal TiO2 nanoparticle contents on the optical properties of poly (9,9′-di-n-octylfluorenyl-2,7-diyl) conjugated polymer (PFO) has been investigated. The solution blending method was used to prepare homogenous PFO/TiO2 nanocomposite. The nanocomposite films were prepared on glass substrates using the spin-coating technique. The films were divided into two groups, the first was left to dry at room temperature while the second was heat-treated at 120 °C for 1 h. Absorption and emission spectra showed that the PFO existed in α-and Β-phases morphology having monomeric, excimeric, and double excimeric states. In addition, both spectra revealed that TiO2 contents and heat treatment temperature extended the conjugation length of PFO. Finally, emission spectra for both cases exhibited decreasing in the line width of zero-phonon emission spectra and increasing in the vibronic splitting energy, upon increment of the TiO 2, led to a significant increase in π-electron delocalization and lower degree in chain disorder.

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