Thermal Annealing Effects on the Morphology and Charge Transport of Polymer Semiconductor Nanowires Aligned in an Insulating Polymer Matrix
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초록
내용
Thermal annealing was found to profoundly affect the molecular ordering, orientation, morphologies and charge transport of poly(3-hexylthiophene) (P3HT) NWs aligned within a PS matrix. Upon thermal annealing, the structural and morphological changes of the aligned P3HT NWs were systematically studied using static absorption spectroscopy, X-ray diffraction, atomic force microscopy, and polarized optical microscopy; the change in charge transport properties was investigated using macroscale charge carrier mobility measurements. Further, the thermal annealing temperature and duration were thoroughly correlated with the molecular ordering, orientation, and charge transport properties of the aligned P3HT-NW/PS blend films. It was revealed that charge transport of the aligned blend films is determined by the complicate interplay between molecular ordering, orientation, and morphologies that are prone to be changed by post-thermal annealing conditions.