Influence of horizontal distribution of polymer phases on the dispersion and crystallization of organic semiconductor triisopropylsilyl pentacene

Jia Hong Pan, Ching Feng Wu, Chen An Wang, Kun Ta Lin, Jr-Jeng Ruan

Research output: Contribution to journalArticle

Abstract

The influence of horizontal distribution of conjugated poly(3-hexylthiophene) (P3HT) and insulating Poly(methyl methacrylate) (PMMA) on the dispersion and crystallization of organic semiconductor bis(triisopropylsilylethynyl) pentacene (TIPS pentacene) has been studied in this research. Within the vitrified PMMA-rich island-like domains, the crystallization of TIPS pentacene was still able to occur and results in scattered crystallites via short-range molecular diffusion. Contrarily, larger clusters of crystallites are able to develop within the molten P3HT-rich domains. During the annealing above the glass transition temperature of PMMA component, the TIPS pentacene prefers to assemble into P3HT-rich domains. However, as the crystallization rate is comparable with the diffusion efficiency, linear crystal growth of TIPS pentacene is observed to propagate across the PMMA domains. Furthermore, the stacking of crystallites of TIPS pentacene within P3HT-rich domains is preferentially along the domain boundaries, reflecting the dominance of nucleation along the boundaries instead of molecular assembly. When the crystallization is less efficient during the annealing above 115 °C, TIPS pentacene molecules are able to assemble together within P3HT-rich domains prior to crystallization, causing the absence of TIPS pentacene crystallites within PMMA domains. Accordingly the competition between crystallization and molecular assembly, and also the disparity of chemical affinity of surrounding polymer phases, have been illustrated as the background for the dispersion of crystallites of TIPS pentacene. The distribution of polymer phases is thus realized helpful for the evolution of desired two-dimensional stacking of functional crystals.

Original languageEnglish
Pages (from-to)112-119
Number of pages8
JournalMaterials Chemistry and Physics
Volume216
DOIs
Publication statusPublished - 2018 Sep 1

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horizontal distribution
Semiconducting organic compounds
organic semiconductors
Crystallization
Polymethyl methacrylates
Crystallites
Polymers
Polymethyl Methacrylate
crystallization
polymethyl methacrylate
crystallites
polymers
Annealing
assembly
Crystal growth
molecular diffusion
annealing
pentacene
Molten materials
Nucleation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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title = "Influence of horizontal distribution of polymer phases on the dispersion and crystallization of organic semiconductor triisopropylsilyl pentacene",
abstract = "The influence of horizontal distribution of conjugated poly(3-hexylthiophene) (P3HT) and insulating Poly(methyl methacrylate) (PMMA) on the dispersion and crystallization of organic semiconductor bis(triisopropylsilylethynyl) pentacene (TIPS pentacene) has been studied in this research. Within the vitrified PMMA-rich island-like domains, the crystallization of TIPS pentacene was still able to occur and results in scattered crystallites via short-range molecular diffusion. Contrarily, larger clusters of crystallites are able to develop within the molten P3HT-rich domains. During the annealing above the glass transition temperature of PMMA component, the TIPS pentacene prefers to assemble into P3HT-rich domains. However, as the crystallization rate is comparable with the diffusion efficiency, linear crystal growth of TIPS pentacene is observed to propagate across the PMMA domains. Furthermore, the stacking of crystallites of TIPS pentacene within P3HT-rich domains is preferentially along the domain boundaries, reflecting the dominance of nucleation along the boundaries instead of molecular assembly. When the crystallization is less efficient during the annealing above 115 °C, TIPS pentacene molecules are able to assemble together within P3HT-rich domains prior to crystallization, causing the absence of TIPS pentacene crystallites within PMMA domains. Accordingly the competition between crystallization and molecular assembly, and also the disparity of chemical affinity of surrounding polymer phases, have been illustrated as the background for the dispersion of crystallites of TIPS pentacene. The distribution of polymer phases is thus realized helpful for the evolution of desired two-dimensional stacking of functional crystals.",
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Influence of horizontal distribution of polymer phases on the dispersion and crystallization of organic semiconductor triisopropylsilyl pentacene. / Pan, Jia Hong; Wu, Ching Feng; Wang, Chen An; Lin, Kun Ta; Ruan, Jr-Jeng.

In: Materials Chemistry and Physics, Vol. 216, 01.09.2018, p. 112-119.

Research output: Contribution to journalArticle

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T1 - Influence of horizontal distribution of polymer phases on the dispersion and crystallization of organic semiconductor triisopropylsilyl pentacene

AU - Pan, Jia Hong

AU - Wu, Ching Feng

AU - Wang, Chen An

AU - Lin, Kun Ta

AU - Ruan, Jr-Jeng

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