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Controlled Pinning of Conjugated Polymer Spherulites and Its Application in Detectors
Author(s) -
Dörling Bernhard,
SánchezDíaz Antonio,
Arteaga Oriol,
Veciana Andrea,
Alonso Maria Isabel,
CampoyQuiles Mariano
Publication year - 2017
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201700276
Subject(s) - materials science , nucleation , polymer , crystallite , photoconductivity , polarization (electrochemistry) , optoelectronics , isotropy , conjugated system , fabrication , photodetector , optics , composite material , medicine , chemistry , physics , alternative medicine , organic chemistry , pathology , metallurgy
The 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.