Fig. 3: Optical and electronic properties of typical samples.
a UV-Vis diffuse reflectance spectrum of PY-DHBD-COF. Insert: Tauc plot in the form of (αhυ)2 versus hυ. b UPS spectrum of PY-DHBD-COF. c Mott–Schottky plots of PY-DHBD-COF. d Energy band positions of COFs.
