Jump to main content
Jump to site search

Issue 3, 2015
Previous Article Next Article

Preparation of n-type semiconducting polymer nanoarrays by covalent synthesis followed by crystallization

Author affiliations

Abstract

In situ covalent synthesis followed by solution crystallization of the n-type semiconducting polymer derived from perylenediimide-bridged silsesquioxanes (PDIB-SSQ) yielded 1D-nanoarrays of 40–100 nm widths and up to 80 μm lengths. Morphologies and dimensions of nanostructures resulting from different base concentrations were characterized by SEM, fluorescence optical microscopy, SAXS, elemental analysis, MALDI-TOF-MS, and absorption and fluorescence spectroscopies. As revealed by SAXS, the nanostructures are composed of crystalline unit cells with cell parameters of d[001] = 24.8 Å and d[100] = 10.3 with multiple π–π stacking distances ranging from 4.71 to 2.57 Å. The ordering in polymer nanoarrays is favoured by the π–π interactions between the cofacially arranged PDI cores, resulting closely packed polymer arrays with the d-spacing ranging from 3.67 Å to 3.24 Å. The spectroscopic traces of nanoarrays in solution resembled that of the monomer except the slightly red shifted features of the emission spectrum associated with π–π stacking of polymer chains in aggregated form. Thin film emission spectra followed the similar spectral pattern with a noticeable shoulder corresponds to cofacial π–π interactions. The excited state lifetimes of aggregated polymer nanoarrays in both solution and solid phase were nearly identical. The electrical characterization of thin films made from polymer nanoarrays shows typical semiconducting behaviour with the electrical conductivity of 0.48 × 10−3 S cm−1. The covalent synthesis followed by solution-based crystallization of PDIB-SSQ reported herein provides a new synthesis path to make ordered-crystalline semiconducting polymer nanoarrays and ultimately a benefit for better understanding of their role in organic electronics.

Graphical abstract: Preparation of n-type semiconducting polymer nanoarrays by covalent synthesis followed by crystallization

Back to tab navigation

Supplementary files

Publication details

The article was received on 17 Jun 2014, accepted on 06 Jan 2015 and first published on 07 Jan 2015


Article type: Paper
DOI: 10.1039/C4NJ00968A
Author version available: Download Author version (PDF)
Citation: New J. Chem., 2015,39, 2004-2010
  •   Request permissions

    Preparation of n-type semiconducting polymer nanoarrays by covalent synthesis followed by crystallization

    B. Fouzia, J. Ferguson, K. McKenna, L. E. McNamara, N. I. Hammer and H. Rathnayake, New J. Chem., 2015, 39, 2004
    DOI: 10.1039/C4NJ00968A

Search articles by author

Spotlight

Advertisements