| 초록 |
Poly(3-hexylthiophene) (P3HT) is the most promising donor material for commercialization of organic solar cells (OSCs) due to synthetic feasibility. However, successful achievement to secure thermal stability of P3HT and non-fullerene small molecule acceptor based on OSCs have been rarely revealed. In this study, we develop a novel non-covalently fused-ring acceptor (NFRA) named CPDT-ICMe for efficient and thermally stable P3HT based OSCs. The incorporation of NFRA skeleton facilitates condense packing structures with tighter and strengthen crystalline behavior in P3HT blend system. As a results, CPDT-ICMe NFRA successfully suppressed morphological deformation in blend film. Remarkably, CPDT-ICMe based OSCs maintained 98.5 % to initial power conversion efficiency (PCE) after 100 hours at 120 °C with initial PCE of 7.52 %. This work firstly demonstrates design strategy toward efficient and thermally stable non-fullerene small-molecule acceptor (NF-SMA) in P3HT based OSCs. |
