| 초록 |
A new series of PDs by incorporating a hydrophilic flexible spacer (FS) is developed and demonstrate efficient PSCs with a high power conversion efficiency (PCE) of 17.74% processed by hydrocarbon-solvent (toluene) process. The FS alleviates excessive backbone rigidity of the PDs, while retaining sufficient aggregation of the PDs toluene. Also, the FS enhances PD/SMA interfacial interactions and improve the blend morphology, affording efficient charge generation and mechanical stress dissipation. Therefore, the resulting PSCs with FS incorporated PD showed superior PCE (17.74%) and crack-onset strain (10.50%) values, outperforming the PSCs without the FS (PCE = 15.7% and COS = 2.99%). This work provides simple and effective strategy to design PDs for the efficient, green-solvent processed and mechanically robust PSCs. |
