Formation of a highly ordered red phase in a MEH-PPV: polystyrene pseudogels

TL;DR

This paper reports the formation of a highly ordered red phase in MEH-PPV embedded in a polystyrene pseudogel, enabling simple processing for optoelectronic applications by preserving solution features in the gel.

Contribution

It introduces a novel pseudogel matrix that facilitates the formation and processing of a red-phase MEH-PPV with preserved optoelectronic properties.

Findings

Red-phase MEH-PPV can be formed in a polystyrene pseudogel.

The gel preserves solution-like features for optoelectronic processing.

The method simplifies the processing of MEH-PPV for device applications.

Abstract

In this work, we demonstrate the formation of a "red-phase" poly[2-methoxy, 5-(2'- ethyl-hexoxy)-1,4-phenylene vinylene-PPV] (MEH-PPV) embedded into a host matrix of highly entangled ultra-high molecular weight polystyrene (MEH-PPV/UHMW PS pseudogel) that allows the simple processing of the MEH-PPV solutions. We processed a "red-phase" in the gel, the gel shows that the features what have beed demonstrated in the solution can be observed in the processable gel for optoelectronics applications. [Yamagata, Hajime, and Hestand, Nicholas J. and Spano, Frank C. and Kohler, Anna and Scharsich, Christina and Hoffmann, Sebastian T. and Bassler, Heinz, The Journal of Chemical Physics, 2013, 139, 114903]