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Updated: May 16, 2026

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
Published on: March 2, 2021
Light-harvesting organic photoinitiators of polymerization
Jacques Lalevée1, Mohamad-Ali Tehfe, Frédéric Dumur
1Institut de Science des Matériaux de Mulhouse, IS2M-LRC CNRS 7228-ENSCMu-UHA; 15, rue Jean Starcky, 68057 Mulhouse Cedex, France. jacques.lalevee@uha.fr
Abstract:
Two new photoinitiators with unprecedented light absorption properties are proposed on the basis of a suitable truxene skeleton where several UV photoinitiators PI units such as benzophenone and thioxanthone are introduced at the periphery and whose molecular orbitals MO can be coupled with those of the PI units: a red-shifted absorption and a strong increase of the molecular extinction coefficients (by a ≈ 20-1000 fold factor) are found. These compounds are highly efficient light-harvesting photoinitiators. The scope and practicality of these photoinitiators of polymerization can be dramatically expanded, that is, both radical and cationic polymerization processes are accessible upon very soft irradiation conditions (halogen lamp, LED…︁) thanks to the unique light absorption properties of the new proposed structures.
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