Spark Discharge Doping—Achieving Unprecedented Control over Aggregate Fraction and Backbone Ordering in Poly(3‐hexylthiophene) Solutions

Abstract

Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

Enhancement of Conjugated Polymer Microstructure and Mixed-Conducting Properties via Chalcogenophene Heteroatom Substitution

“…Aside from producing well-ordered, high-performance, OMIECs through heteroatom substitution, learning from these heteroatom effects provides rational structural targets for high performing, ion-efficient, and low-temperature OMIECs and OECTs. Beyond heteroatom substitution (which brings with it issues of material and device stability), these microstructures that benefit mixed conduction are likely achievable through alternate means, such as solution preaggregation, 66 film postprocessing, 47 or film/fiber strain alignment. 67 Thus, this study both maps a new route for microstructural control of OMIECs but also provides the direction for future synthetic, structural, and processing studies.…”

Tackling P3HT:Y‐Series Miscibility Through Advanced Processing for Tunable Aggregation

“…CID Treatment: Since this work is interested to exploit highly ordered aggregates, chloroform as solvent was chosen at a temperature of 20 °C with a voltage of 300 V for charging the capacitor, which yielded the highest aggregate quality in this extensive previous study. [21] The untreated P3HT solutions were prepared by dissolving P3HT in chloroform at 50 °C for 20 min. Prior to the CID treatment, the solutions were kept for 15 min at 20 °C to allow for proper equilibration.…”

“…This procedure of charging the capacitor, connecting, and approaching the tungsten wires was repeated until the desired number of CID treatment steps was achieved. [21] Sample Preparation: The glass and silicon substrates were cut to the desired size and then thoroughly cleaned by sonication in Alconox, VEwater, and isopropanol for 10 min each. To ensure a comparable surface all samples were spin-coated with sonicated PEDOT:PSS at 3000 rpm.…”

“…Moreover, the solvent as well as concentration, and especially the temperature during treatment play an important role. [21] We want to investigate the influence of the CID treatment on the film formation of neat P3HT and especially on blends with Y12, a highly miscible Y-series NFA with alkyl chains identical to ZY-4Cl. To control the aggregate fraction in the solution prior to casting the films, we varied the number of CID steps.…”

“…[ 11,18–20 ] Thus, chemical modification of NFAs is one possibility to achieve phase separation. Here we demonstrate that applying a new technique called current‐induced doping (CID) [ 21 ] to obtain high‐quality P3HT aggregates in solution can improve the P3HT aggregation in dried thin films with and without a second component present and hence causing an effective phase separation in an otherwise miscible material system.…”