Figure 9. (a) A summary of the crystalline evolution of PTB7 is provided for the specified solvent and additive combinations. Various stages of development are marked, with the presence of gray regions indicating the absence of further progression. Reproduced from [119]. (b) The film-forming process with 0% or 0.3% DIO. Reproduced from [93]. (c) The schematic diagram of crystallization kinetics. Reproduced from[120]. (d) The abridged graph of film-forming process with and without TCB. Reproduced from [121].