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Understanding the mechanism of interaction between organic polymers and dopants is of great significance to further enhance the performances of flexible electronics. Here, the two doping mechanisms of charge transfer complex (CTC) and integer charge transfer (ICT) are found to coexist in p-π conjugated PTAA doped with the strong acceptor F4-TCNQ, and their correlation is affected by the HJ-aggregate state of the doped polymer. The growth of the J-aggregate caused by the increase of CTC would lead to a corresponding formation of ICT. The doping efficiency wa