期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 9, 期 19, 页码 6234-6240出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1tc01036k
关键词
-
资金
- Italian Minister of instruction, university and research [20173L7W8K, 2017YH9MRK]
Rubbing was used on thiophene-based organic semiconductor thin films to induce reversible mechanical amorphisation, which is associated with fluorescence switching regulated by the film's polymorphic nature. Thermal annealing of the films produced an opposite effect, inducing film crystallization starting at a low temperature and generating a stable polymorph at high temperatures in the bulk. The mechanism of mechanical transformation was explained considering the material's mechanical properties and demonstrated through X-ray diffraction, atomic force microscopy, and photoluminescence at confocal microscopy.
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.
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