By introducing a dihydronaphthyl-based C60 bisadduct (NCBA) small molecule acceptor as an third component materials to typical polymer donor:fullerene acceptor binary polymer solar cells (PSCs), we demonstrate that the short-circuit current density (J_SC), open circuit voltage (V_OC), fill factor (FF), power conversion efficiency (PCE), and thermal stability can be enhanced simultaneously. The ternary photoactive layer enhances photogenerated charge-carrier generation efficiency through complementary short wavelength visible-light absorption between the donor molecule and fullerene acceptors. Simultaneously, the improved PSC performance is mainly attributed to the enhanced exciton dissociation and charge-carrier transport. Furthermore, we find that the NCBA as third component materials can reduce charge-carrier recombination and enhancement of thermal stability in ternary PSCs as well. The results bring new insight into the future development of high-efficiency ternary PSCs.

通过向典型的聚合物供体：富勒烯受体二元聚合物太阳能电池（PSC）中引入基于二氢萘基的C60双加合物（NCBA）小分子受体作为第三种成分，我们证明了短路电流密度（J _SC），开路电压（V _OC），填充系数（FF），功率转换效率（PCE）和热稳定性可以同时提高。三元光敏层通过在供体分子和富勒烯受体之间互补的短波长可见光吸收来提高光生电荷载流子的产生效率。同时，PSC性能的提高主要归因于激子离解和电荷载流子传输的增强。此外，我们发现作为第三组分材料的NCBA还能减少三元PSC中的电荷载流子复合并增强热稳定性。结果为高效三元PSC的未来发展带来了新的见解。