Non‐conventional Processing and Post‐processing Methods for the Nanostructuring of Conjugated Materials for Organic Electronics

Abstract

In the search for new ways to combine the appealing simplicity of solution processing methods and the need for a high performance of the active layer of organic (opto)electronic devices, the possibilities given by the joint use of well-established casting techniques and post-treatment procedures are explored, as well as new and unconventional deposition protocols to tailor self-assembled architectures with a high degree of order at different length scales, from the subnanometer up to the macroscopic scale. In fact, even the same organic molecule can give rise to different molecular architectures which, in turn, may offer the possibility to exploit a large variety of new functionalities of the deposited materials, paving the way towards the fabrication multifunctional organic-based devices.

Enhancement of field-effect mobility due to structural ordering in poly(3-hexylthiophene) films by the dip-coating technique

“…Dip coating has been employed to solution processable heteroacenes with fused thiophene units, which are highly attractive for OFET applications (De Luca et al, 2011). Here processing by dip coating has induced an edgeon arrangement towards the surface, with highly ordered structures and long-range orientation of oligomers (Aasmundtveit et al, 2000;Cho et al, 2006;De Luca et al, 2011;Wang et al, 2004).…”

“…In order to enhance structural properties, many research groups have examined different fabrication steps to improve chain orientation by self-assembly of the molecules in the liquid crystal phase, by substrate texturing and by the use of chemically patterned surfaces (De Luca et al, 2011;Kim et al, 2005;Xue et al, 2010;Yasuda, 2010). The most extensively investigated factor among others affecting the field-effect mobility is the molecular ordering of nanocrystallites in P3HT thin-film transistors (Sirringhaus et al, 1999;Cho et al, 2006;Hao et al, 2007;Joshi et al, 2008).…”

Choline Phosphate Functionalized Cellulose Membrane Developed as Potential Hemostasis Dressing Based on a Unique Bioadhesion Mechanism

“…The AFM is best known for its high-resolution imaging capabilities [13]- [14], but it is also a powerful tool for sensitive force-distance measurements [15]- [16]. Fig.…”

A triphenylene-based small molecule compatibiliser using incompatible pendent chains

“…However, the morphology of blends of functional small molecules is challenging to control; it relies mainly on the use of non-functional additives and/or annealing treatments. 8,9 Furthermore, the morphology obtained with such methods is only kinetically trapped and macrophase separation, the thermodynamically stable morphology, will occur over time. In addition, as the role of the additive is purely structural, only a small amount should be used, and as it oen remains in the blends, it can impact further the long-term stability of electronic devices.…”