Fig. 1. (a) Suzuki coupling route for PDB conjugated polymers. (b) Schematics of the fabrication process of the CPDB composite. (c,d) TEM images of CPDB. (e) High-resolution TEM (HRTEM) image of the CdS component. (f-j) Elemental (C, N, F, S, and Cd) distribution of CPDB. Reproduced with permission from Ref. [10]. Copyright 2022, Wiley.

Fig. 2. High-resolution XPS profiles of N 1s (a) and Cd 3d (b) in CPDB5 under dark and light-irradiated (λ = 365 nm) conditions. Two-dimensional TA spectra maps of single CdS (c) and CPDB5 composite (d). (e) TA spectral signals at different decay times for CPDB5. (f) Simulated decay pathways of charge carriers in the CPDB heterojunction and corresponding lifetimes. Reproduced with permission from Ref. [10]. Copyright 2022, Wiley.