In this section, you can access to the latest technical information related to the FUTURE project topic.

Poly(3-hexylthiophene)/poly(styrene) blended colloids: Exploiting the effects of composition and marginal solvent

Herein, aqueous suspensions of poly(3-hexylthiophene)/poly(styrene) (P3HT/PS) blended colloids with varied ratios were prepared using a miniemulsion process. The effects of composition and marginal solvent amount on the aggregates, optical and hole-transport properties of P3HT/PS blended colloids were investigated. Both PS and THF promoted P3HT chain aggregation and electronic coupling, resulting in a red-shift and increased absorbance intensity at the 0-0 and 0-1 vibronic peaks in aqueous suspensions. But, PS prevented further chain packing and aggregation during thermal annealing in solid-state of P3HT/PS blended colloid films, compared to pure P3HT colloids. The crystal lattice spacing in alkyl packing direction of P3HT was not affected by either PS or THF. Additionally, the hole mobility of FETs using pure P3HT colloids was 9.08?×?10?5?cm2/Vs, which decreased when P3HT/PS blended colloids were used. However, incorporation of THF enhanced the hole mobility of FETs using P3HT/PS(2/8) blended colloids, from 0.76?×?10?5 cm2/Vs for FETs using blended colloids made from solvent without THF to 1.24?×?10?5?cm2/Vs for FETs using blended colloids made from solvent mixture with 10?vol% THF. These performance improvements will enable greener, more industrially-relevant water-processing of polymers for emerging organic electronics.

» Author: Bin Tan, Hao Pan, Bridgette M. Budhlall, Margaret J. Sobkowicz

» Reference: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 539

» Publication Date: 20/02/2018

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