Film thickness dependency of the emission colors of PPE–PPVs in inkjet printed libraries

Tekin, Emine; Wijlaars, Harald; Holder, Elisabeth; Egbe, Daniel A. M.; Schubert, Ulrich S.

Abstract:

The influence on the emission color of p-conjugated polymers varying side chains, film thicknesses and thermal treatment were investigated in a parallel fashion. The respective thickness libraries of six alkoxy-substituted poly(p-phenyleneethynylene)- alt-poly(p-phenylenevinylene)s (PPE–PPVs) were prepared by inkjet printing in a controlled way. The optical properties of the printed libraries were screened utilizing high-throughput methods. It was found that the emission colors of the investigated polymers strongly depend on the inter-chain interactions which are increased with increasing film thickness and influenced by the side chains. Moreover, upon annealing at 70 uC, white emission was observed from the printed films.

Year:

2006

Type of Publication:

Article

Journal:

Journal of Materials Chemistry

Volume:

16

Pages:

4294 - 4298