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Two copolymers based on 2,1,3-benzoxadiazole (BO) as the acceptor unit and quaterthiophene as the donor unit, which possess different steric hindrance in the backbone, were designed and synthesized. The backbone conformations and electronic structures as well as the theoretically optimal structures of both copolymers were calculated. The influences of steric hindrance on photophysical and electrochemical...
Solvent treatment has been widely used to improve the device performance of both Organic Light Emitting Diodes (OLEDs) and Polymer Solar Cells (PSCs). One of the proposed mechanisms is the modification of the buried PEDOT:PSS layer underneath the organic active layer by the permeating solvent. By measuring the lateral electric conductivity of the PEDOT:PSS layer, the 3 orders of magnitude's enhancement...
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