| 초록 |
The authors report an polymer solar cell (PSC) system with 10% of power conversion efficienies (PCEs) and 30% of the entire device stretchablility, by employing high molecular weight (MW) polymer aceptor (PA) additives into highly efficient PSC system. Intiguingly, the binary PSC system showed ultra-high PCE of 15.42% without PA additive, and the PCE is maintained up to 13.97% with incorporating 30% of the additive in the PSC fabrication. We note the engineering crack onset strain (COS) sharply increases with loading of the PA additives, showing 6-fold increase from 2.21 at the blend without the additive to 11.93% with 30% of the PA loading. We revealed both the PCE maintanence and the skyrocketed mechanical robustness with loading of the PA additive are mainly attributed to the formation of chain entanglement and tie molecules due to long PA chains. |
