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Controlled Pinning of Conjugated Polymer Spherulites and Its Application in Detectors

AuthorsDörling, Bernhard ORCID; Sánchez Díaz, Antonio; Arteaga, Oriol; Veciana, Andrea; Alonso Carmona, M. Isabel CSIC ORCID ; Campoy Quiles, Mariano CSIC ORCID
KeywordsConjugated polymers
Molecular orientation
Photovoltaic devices
Issue Date31-Jul-2017
CitationAdvanced Optical Materials: 10.1002/adom.201700276 (2017)
AbstractThe nucleation of single macroscopic spherulites at desired positions, as well as ordered arrays of multiple spherulites, is demonstrated by combining the use of crystallizable solvents with local control of solvent evaporation during solution deposition. Moreover, the temperature assisted localized frustration of molecular orientation is shown, enabling the fabrication of samples containing both isotropic areas and spherulites. These macroscopic circular polycrystalline structures are characterized using a range of polarized spectroscopic techniques that allow quantifying their large degree of chain orientation. In order to show the potential of these large conjugated polymer spherulites centered at desired locations, graded bilayer organic photovoltaic devices were fabricated to be used as polarimeters, solid state light polarization detectors with no moving parts, and position sensitive photodetectors.
Publisher version (URL)http://dx.doi.org/10.1002/adom.201700276
Appears in Collections:(ICMAB) Artículos
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