Elucidation of the Structure–Property Relationship of p‑Type Organic Semiconductors through Rapid Library Construction via a One-Pot, Suzuki–Miyaura Coupling Reaction

The elucidation of the structure–property relationship is an important issue in the development of organic electronics. Combinatorial synthesis and the evaluation of systematically modified compounds is a powerful tool in the work of elucidating structure–property relationships. In this manuscript, D−π–A structure, 32 p-type organic semiconductors were rapidly synthesized via a one-pot, Suzuki–Miyaura coupling with subsequent Knoevenagel condensation. Evaluation of the solubility and photovoltaic properties of the prepared compounds revealed that the measured solubility was strongly correlated with the solubility parameter (SP), as reported by Fedors. In addition, the SPs were correlated with the J_sc of thin-film organic solar cells prepared using synthesized compounds. Among the evaluated photovoltaic properties of the solar cells, J_sc and V_oc had strong correlations with the photoconversion efficiency (PCE).