Fig. 3: Photophysical and electrochemical properties of the B[f]QCOFs.

a The UV-Vis DRS of the B[f]QCOFs. b The Tauc plots of the B[f]QCOFs for band gap calculation. c The experimentally derived energy band alignments of the B[f]QCOFs. d Electrochemical impedance spectroscopy (EIS) Nyquist plots of the B[f]QCOFs. e Comparison of the photocurrent response of the B[f]QCOFs. f Temperature-dependent PL spectra of B[f]QCOF-1 excited at 340 nm for the determination of binding energy (Eb). g, h The femtosecond time-resolved transient absorption (fs-TA) spectra of the B[f]QCOF-1. i The TA delay kinetic profile of B[f]QCOF-1.