Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6469329 | Dyes and Pigments | 2017 | 12 Pages |
â¢The structure-property relationship of fused-ring electron acceptors is briefly discussed.â¢The principle of molecular design is presented.â¢A novel non-fullerene acceptor material DNIT-TT2T is designed and synthesized.â¢OSCs based on P3HT:DNIT-TT2T are investigated, exhibiting high Voc.
In this work, the structure-property relationship of fused-ring electron acceptors is briefly discussed and the principle of molecular design is presented. Based on this principle, perylene diimide (PDI) was cracked by inserting thiophene and thieno[3,2-b]thiophene (TT) to design and synthesize a novel A-D-A (acceptor-donor-acceptor) small molecule DNIT-TT2T, which served as a non-fullerene acceptor material in our fabricated organic solar cells (OSCs). DNIT-TT2T shows excellent thermal stability, it possesses a broad absorption by covering the wavelength range of 300-600 nm and relatively high LUMO energy level of â3.75 eV, which is close to the theoretically calculated value. The power conversion efficiency (PCE) of OSCs based on the blend of P3HT donor and DNIT-TT2T acceptor (1:1, w/w) is found to be 1.25%, with a high open-circuit voltage (Voc) of 0.88 V, indicating that 1,8-naphthalimide (NI) based molecules are promising acceptors for non-fullerene polymer solar cells and excellent photovoltaic properties can be achieved by rationally designing the molecules.
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