Tuning Aggregation of Poly(3-hexylthiophene) within Nanoparticles

Title

Tuning Aggregation of Poly(3-hexylthiophene) within Nanoparticles

Subject

CONJUGATED POLYMER NANOPARTICLES; COMPOSITE P3HT/PCBM NANOPARTICLES; THIN-FILM TRANSISTORS; FIELD-EFFECT MOBILITY; SOLAR-CELLS; REGIOREGULAR POLY(3-HEXYLTHIOPHENE); CHARGE-TRANSPORT; PARTICLE SPECTROSCOPY; MORPHOLOGY CONTROL; OPTICAL-PROPERTIES

Description

Nanoparticles derived from pi-conjugated polymers have gained widespread attention as active layer materials in various organic electronics applications. The optoelectronic, charge transfer, and charge transport properties of pi-conjugated polymers are intimately connected to the polymer aggregate structure. Herein we show that the internal aggregate structure of regioregular poly(3-hexylthiophene) (P3HT) within polymer nanoparticles can be tuned by solvent composition during nanoparticle fabrication through the miniemulsion process. Using absorption spectra and single-NP photoluminescence decay properties, we show that a solvent mixture consisting of a low boiling good solvent and a high boiling marginal solvent results in polymer aggregate structure with a higher degree of uniformity and structural order. We find that the impact of solvent on the nature of P3HT aggregation within nanoparticles is different from what has been reported in thin films.

Source

 ACS Nano, 20126, 10750-10758. [Link] 

Date

2012

Contributor

Nagarjuna, Gavvalapalli; Baghgar, Mina; Labastide, Joelle A.; Algaier, Dana D.; Barnes, Michael D.; Venkataraman, Dhandapani

Coverage

Chemistry, Multidisciplinary, Chemistry, Physical, Nanoscience & Nanotechnology, Materials Science, Multidisciplinary