Optical absorption of poly(3-alkylthiophenes) at low temperatures

Sundberg, Mårten; Inganäs, Olle; Stafström, Sven; Gustafsson, G.; Sjögren, B.

doi:10.1016/0038-1098(89)90087-2

Cited by 127 publications

(77 citation statements)

References 20 publications

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“…Absorption peaks are observed at 510, 550 and 610 nm for the pristine P3HT NPs, which coincide with those of spin-coated P3HT films [18]. The energy difference between the absorption peaks at 510 and 550 nm originates from the coupling of the π-π * transition with one C=C stretching phonon [19]. The peak at ∼ 610 nm is associated with an interchain interaction according to the results of a simulation of the absorption and PL spectra [20].…”

Section: Resultssupporting

confidence: 53%

Tuning optical properties of poly(3-hexylthiophene) nanoparticles through hydrothermal processing

Lee

Park

et al. 2011

Science and Technology of Advanced Materials

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Poly(3-hexylthiophene) (P3HT) nanoparticles (NPs) were prepared by a reprecipitation method. Hydrothermal processing applied external pressure to the pristine P3HT NPs at temperatures ranging from 60 to 150• C. Optical absorption and photoluminescence (PL) spectra for the hydrothermally treated P3HT NPs varied markedly with the processing temperature. With increasing treatment temperature, the absorption peak broadened and the peak position shifted from 510 to 623 nm; moreover, the intensity ratio of the 0-1 to 0-0 emission varied. These changes were caused by interactions between the P3HT main chains and alkyl side groups and conformational modifications induced by the high pressure during the hydrothermal process. The evolution of the optical absorption spectra of the P3HT NPs during the hydrothermal processing was strongly correlated with the variation of PL excitation spectra and with the PL emission spectra of a single NP.

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Section: Resultssupporting

confidence: 53%

Tuning optical properties of poly(3-hexylthiophene) nanoparticles through hydrothermal processing

Lee

Park

et al. 2011

Science and Technology of Advanced Materials

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“…79 As such devices made from poly(3-octylthiophene) (P3OT) have very low PCE of only 0.68%, in spite of chemical and band gap similarities to P3HT. 80,81 Blends and copolymers of P3HT (2b) and P3OT, as well as pure poly(3-heptylthiophene) (P3HpT), were investigated to optimize between the high charge mobility of P3HT (2b) and the extensibility of P3OT. P3HpT produced the best balance, ultimately maintaining the high crystallinity of P3HT (2b), while having a T g lower than room temperature.…”

Section: Effect Of Alkyl Side Chainsmentioning

confidence: 99%

Structure and design of polymers for durable, stretchable organic electronics

Onorato

Pakhnyuk

Luscombe

2016

Polym J

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The field of stretchable electronics has recently gained significant interest from the academic community, with a focus on producing materials that demonstrate reliable electrical performance with improved response to mechanical deformation. This review highlights the recent progress in understanding the relationships between the mechanical behavior and electrical performance of such devices. Potential solutions can take the form of intrinsically elastic polymers, polymer semiconductor/ elastomer blends and alternative engineering-oriented approaches, which are discussed herein. Trends and design strategies are beginning to manifest in this early stage of the stretchable electronics field. The development of stretchable electrical systems can provide unique applications of organic electronics.

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“…band gap, Eg, than the lowest energy 1t-1t* energy difference in an isolated thiophene molecule. The optical absorption spectrum corresponds to that of a semiconductor with an electronic band gap ofEg = 2 eV , as can be seen in Figure 12 [60]. The geometry of the optically excited state of P3A T is not well known.…”

Section: Elecfronic Strucfurementioning

confidence: 99%

“…The vibronic structure appears to correspond to O-n transitions, where n is the index of the vibrational state. These vibronic peaks are separated by approximately 0.2 eV, and can be seen as shoulders on the optical absorption spectra of the polymers in the solid state at low temperatures [60], in solution in poor solvents [35,61], and in polymer blends in the solid state [47,62]. Depending upon conditions, up to 5 shoulders can be distinguished.…”

Section: Elecfronic Strucfurementioning

confidence: 99%

Processable Conducting Poly(3-Alkylthiopenes)

Gustafsson

Inganäs

Salaneck

et al. 1991

Conjugated Polymers

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ABSTRACf. The poly(3-alkylthiophenes) represent a new generation of conducting polymers, that exhibit both solution and melt processability. These properties open new possibilities for the utilization of conducting polymers in practical applications. Furtheonore, the solubility of these polymers enables the characterization of the physical and chemical structure in greater detail than hitherto have been possible. In this chapter we give a brief review of the synthetic routes to the poly(3-alkylthiophenes) as well as an overview of some of the recent results on the physical and chemical characterization of this class of materials. In this overview we include results on stability properties, transport properties, thermo-and solvatochromism. We also discuss some aspects of the utilization of the poly(3-alkylthiophenes) in applications.

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Optical absorption of poly(3-alkylthiophenes) at low temperatures

Cited by 127 publications

References 20 publications

Tuning optical properties of poly(3-hexylthiophene) nanoparticles through hydrothermal processing

Tuning optical properties of poly(3-hexylthiophene) nanoparticles through hydrothermal processing

Structure and design of polymers for durable, stretchable organic electronics

Processable Conducting Poly(3-Alkylthiopenes)

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