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Conjugated polymers are one of the key materials for organic light emitting diodes(OLEDs),organic field-effect transistors(OFETs)and organic solar cells(OSCs)with the great advantage of solution processability.Typical conjugated polymers bear alkyl side chains for solution processability.Oligo(ethylene glycol)(OEG)chains are well-known for its hydrophilicity and have been widely used in supramolecular chemistry and bio-related applications.