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(a) Three-dimensional schematic diagram of the ambipolar memory device and the chemical structure of PDPP-TBT. (b) Band diagram of PDPP-TBT in contact with gold electrodes. (c) SEM image of Au nanoparticle monolayer. (d) Energy band diagrams of the memory transistor at hole trapping mode and electron trapping mode. (e) Optical image of the flexible memory device on PET substrate.
