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- W2891213013 abstract "2-(1,1-Dicyanomethylene)rhodanine (RCN) is an important electron-deficient terminal unit to build non-fullerene acceptors (NFAs) having been realized high power conversion efficiency (PCE) beyond 12% with complicated p-type polymer as electron donor. However, the photovoltaic properties of RCN-based NFAs are unsatisfied when paired with the classic p-type polymer poly(3-hexylthiophene) (P3HT). In order to make a contribution in this regard, we designed two RCN-based small molecular acceptors with A2-A1-D-A1-A2 structure, BT3 and BTA3, where benzothiadiazole (BT) and benzotriazole (BTA) are bridged A1 segments, respectively, to modulate the optoelectronic properties. As a result, P3HT:BTA3 solar cell exhibits a promising PCE of 5.64%, with a VOC of 0.90 V and a fill factor (FF) of 0.65, which is obviously much better than that of P3HT:BT3 (PCE = 2.55%, VOC = 0.72 V, FF = 0.61). The higher electron mobility of P3HT:BTA3 film indicates BTA3 tends to form a continuous pathway for electron transport even at a lower weight ratio of 1:0.3 than 1:0.5 for P3HT:BT3 film. Our results indicate that introducing a weak electron-withdrawing building block BTA is an effective strategy compared with the BT counterpart to improve the performance of RCN-based NFA devices." @default.
- W2891213013 created "2018-09-27" @default.
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- W2891213013 date "2018-09-18" @default.
- W2891213013 modified "2023-10-15" @default.
- W2891213013 title "A<sub>2</sub>–A<sub>1</sub>–D–A<sub>1</sub>–A<sub>2</sub> Type Non-Fullerene Acceptors with 2-(1,1-Dicyanomethylene)rhodanine as the Terminal Groups for Poly(3-hexylthiophene)-Based Organic Solar Cells" @default.
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- W2891213013 doi "https://doi.org/10.1021/acsami.8b10312" @default.
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