Issue 19, 2021

Rubbing induced reversible fluorescence switching in thiophene-based organic semiconductor films by mechanical amorphisation

Abstract

Here, we applied rubbing on thiophene-basedorganic semiconductor thin films to induce a reversible mechanical amorphisation. Amorphisation is associated with fluorescence switching, which is regulated by the polymorphic nature of the film. Thermal annealing of rubbed films produces an opposite effect with respect to rubbing, inducing film crystallization. Notably, thermal crystallisation starts at a low temperature but generates the polymorph stable at a high temperature in the bulk. The mechanism of mechanical transformation is explained considering the mechanical properties of the material and demonstrated through combined X-ray diffraction, atomic force microscopy and photoluminescence at confocal microscopy.

Graphical abstract: Rubbing induced reversible fluorescence switching in thiophene-based organic semiconductor films by mechanical amorphisation

Supplementary files

Article information

Article type
Paper
Submitted
05 Mar 2021
Accepted
13 Apr 2021
First published
14 Apr 2021
This article is Open Access
Creative Commons BY-NC license

J. Mater. Chem. C, 2021,9, 6234-6240

Rubbing induced reversible fluorescence switching in thiophene-based organic semiconductor films by mechanical amorphisation

M. Cavallini, I. Manet, M. Brucale, L. Favaretto, M. Melucci, L. Maini, F. Liscio, M. della Ciana and D. Gentili, J. Mater. Chem. C, 2021, 9, 6234 DOI: 10.1039/D1TC01036K

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