Keynote Novel Functional Polymeric Nanomaterials : Synthesis, Optoelectronic, Selective Dispersion of SWNTs and Photovoltaics Applications
Novel nanomaterials such as polyimides (PIs), polyamides (PAs), conjugated polymers and polynorbornenes (PNBs) weresuccessfully prepared from various polymerization techniques including low temperature polycondensation, Suzukicoupling and ring-opening metathesis polymerization (ROMP). PIs derived from different architecture designs revealed uniquephysical-mechanical, electrical and chemical properties. In addition, the PIs films also exhibited high thermal stability (Tg >300oC), transparency above 90% in visible light region (400-700 nm) and flexibility which are important for optoelectronicapplications. PAs with the pyridine moiety displayed good film forming abilities, flexibility, high thermal resistance andyellow emission at 552 nm due to excimer generated by protonation. Conjugated polymers were used for single-walled carbonnanotube (SWCNT) wrapping to separate metallic and semiconducting nanotubes. Their chiralities such as (6,5), (9,5) or (8,7)were identified by photoluminescence-excitation (PLE) maps as well as UV/vis/NIR absorption spectra. Polytriarylamines- orpoly(triarylamine-fluorene)-based conjugated polymers with water/alcohol solubility were applied for the hole-transportingmaterials of solar cells including perovskite solar cells and organic photovoltaics (OPVs). The conjugated polymers and PNBscontaining hexa-peri-hexabenzocoronene (nanographene) were well dispersed in cyclohexylpyrrolidone (CHP) by bathsonication and possessed exfoliation emission in PLE maps. PNBs synthesized via ROMP showed excellent transparency (90%) and high thermal stability (Tgs > 160 oC). Triarylamine-containing polymers had electrochromic properties and capacity formultiple colour change reversibilities. The triphenylamine-alt-fluorene conjugated copolymer with hexaphenylbenzene (HPB)and pyrene as asymmetrical pendant groups showed the strong near-infrared (NIR) electrochromic absorbance attributed tointervalence charge transfer by the incorporation of the HPB moiety. These polymeric materials had high organo-solubilityin common solvents and as a result can be used for solar cells, organic field effect transistors, polymer memories, and smartwindows applications.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).