Low structure order acceptor as third component enables high-performance semitransparent organic solar cells

Semitransparent organic solar cells (ST-OSCs) are promising candidates for building-integrated photovoltaics. However, the inherent contradiction between active layer absorption and average visible transmittance (AVT) hinders the development of ST-OSCs. Herein, we report high-performance ternary ST-OSCs by incorporating low structure order DCB-4F into PM6:DTPSe-4Cl host blend. The addition of DCB-4F enhances the molecular arrangement in proper multi-length morphology for enhanced charge transport in active layers. As a result, outstanding PCEs of 15.93% and 12.58% are achieved for the corresponding opaque and semitransparent ternary OSCs, respectively. Our work demonstrates that ternary OSCs by introducing low structure order third compo-nent to host binary blends featuring ordered molecular arrangement and low energy loss have great potential for fabricating highly-efficient ST-OSCs.

Automated summary

High-performance ternary semitransparent organic solar cells (ST-OSCs) are achieved by incorporating low structure order DCB-4F into PM6:DTPSe-4Cl host blend. The addition of DCB-4F enhances molecular arrangement for enhanced charge transport in active layers, leading to outstanding power conversion efficiencies of 15.93% and 12.58% for corresponding opaque and semitransparent ternary OSCs.