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Related Experiment Videos

Multicomponent semiconducting polymer systems with low crystallization-induced percolation threshold.

Shalom Goffri1, Christian Müller, Natalie Stingelin-Stutzmann

  • 1Cavendish Laboratory, University of Cambridge, JJ Thomson Ave., Cambridge CB3 0HE, UK.

Nature Materials
|November 28, 2006
PubMed
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This study shows that blending semicrystalline semiconducting polymers with commodity polymers creates vertically stratified structures. This allows for reduced semiconductor concentration in devices without performance loss, lowering costs.

Area of Science:

  • Polymer Science
  • Materials Science
  • Organic Electronics

Background:

  • Multicomponent polymer systems are crucial for achieving desired material properties not attainable by single polymers.
  • In polymer optoelectronics, combining semiconducting conjugated polymers with mechanically robust commodity polymers is highly desirable.
  • Existing blends often face challenges in performance and material cost when integrating these diverse polymer types.

Purpose of the Study:

  • To investigate bicomponent blends of semicrystalline regioregular poly(3-hexylthiophene) and commodity polymers.
  • To explore the potential for creating vertically stratified structures in a single processing step.
  • To assess the impact of these blends on the performance of polymer field-effect transistors (PFETs).

Main Methods:

Related Experiment Videos

  • Fabrication of bicomponent blends using semicrystalline regioregular poly(3-hexylthiophene) and selected semicrystalline commodity polymers.
  • Utilizing crystallization-induced phase segregation to achieve vertical stratification.
  • Incorporating the resulting blends as active layers in polymer field-effect transistors (PFETs).

Main Results:

  • A highly favorable, crystallization-induced phase segregation was observed, expelling the semiconductor to the film surfaces.
  • Vertically stratified structures were successfully obtained in a one-step process.
  • Semiconductor concentration could be reduced to as low as 3 wt% in PFETs without performance degradation, unlike blends with amorphous insulators.

Conclusions:

  • Crystalline-crystalline/semiconducting-insulating multicomponent systems offer a flexible route to high-performance semiconducting architectures.
  • These blends significantly reduce materials cost while enhancing mechanical properties and environmental stability.
  • Performance requirements do not need to be solely engineered into the active semiconducting polymer itself.