In the current work, we synthesized an A-D-A smallmolecule photosensitizer, denoted as DPTTIC, and a dual PEG-functionalized pillararene, denoted as WP5-8C-2PEG, and used them to construct novel DPTTIC nanoparticles (NPs) displaying NIR II absorption. Under 980 nm-wavelength laser irradiation, DPTTIC NPs performed well in mild-temperature photothermal and type I & II photodynamic anti-tumor therapy.