Fig. 1. Schematic of molecular structure of polymer IPDT and ultraviolet-visible absorption spectrum of polymer IPDT film. (a) Schematic of molecular structure; (b) ultraviolet-visible absorption spectrum

Fig. 2. Structural diagram of polymer memristor. (a) Structural diagram of Al/IPDT/ITO device; (b) SEM image of cross-section of device; (c) AFM image of polymer IPDT film

Fig. 3. Device performances. (a) I-V curve of Al/IPDT/ITO memristor, and inset indicating I-V curve of device from -3 V to 3 V; (b) stability test results of device

Fig. 4. I-V curves of device after 632 nm laser irradiation for different time. (a) 20 s; (b) 60 s

Fig. 5. Stability test results of device. (a) After 632 nm laser irradiation for 60 s; (b) resistance changes of HRS and LRS in test for first 50 cycles

Fig. 6. I-V curves of device after modulation by laser with different wavelengths. (a) 405 nm; (b) 514 nm

Fig. 7. AFM images of polymer IPDT in tunneling mode. (a) Without laser; (b) after 632 nm laser irradiation for 1 min