Facile preparation of OHB-T–carbon nanotube composite films for modification of the electrical and optical properties

Optoelectronic sensitive materials with the advantages of facile preparation, high electrical conductivity, large temperature coefficient of resistance, and strong optical responses are highly attractive for the practical applications in devices. Herein, high-quality binary composite films that are composed of an insulating organic nonlinear optical material method and conductive carbon nanotubes (CNTs) were prepared by spraying coating, and consequently, the electrical and optical properties were significantly modified. Measurements reveal that the as-prepared compact rod-like composite film with a CNT concentration of 10 wt% exhibits the optimal comprehensive properties of desirable resistance (9.8 × 10 4 Ω), high temperature coefficient of resistance (– 0.30% K −1 ), and high absorption in a wide range from near-ultraviolet to mid-infrared. In contrast, too high or too low CNT concentration in the composite film will lead to degradation of the properties. This suggests that the OHB-T–10 wt% CNT composite film could be a promising sensitive material applied in the optoelectronic detectors. The chemical structures, electrical, and optical properties of the OHB-T-based thin films presented in this work are not only helpful for better understanding OHB-T, but also suggest a route for production of novel optoelectronic sensitive materials for device applications.