Terrylene diimide-based middle-low bandgap electron acceptors for organic photovoltaics,Journal of Materials Chemistry C

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Terrylene diimide-based middle-low bandgap electron acceptors for organic photovoltaics
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2020/02/20 , DOI: 10.1039/d0tc00103a
Fei Tang _{1,

2,

3,

4,

5} , Danlei Zhu _{1,

2,

3,

4,

5} , Ningning Liang _{4,

6,

7,

8} , Jianhui Hou _{1,

2,

3,

4,

5} , Zhaohui Wang _{1,

2,

3,

4,

5}

Affiliation

Rylene diimides have evolved as the most investigated compounds among polycyclic aromatic hydrocarbons, due to their excellent absorption, fluorescence and outstanding electron-withdrawing ability. In this work, we present two A–D–A type electron acceptors based on terrylene diimides and investigate the impact of intramolecular nonbonding conformational locks on the molecular geometry, the solid packing arrangement and the photovoltaic performance. Detailed investigation demonstrates that the introduction of fluoride atoms facilitates the noncovalent interactions with sulfur elements on adjacent thiophene groups and therefore, more balanced charge transfer and suppressed bimolecular recombination promotes the J_SC and FF, endowing the solar cells based on fluoride-substituted acceptors with a higher PCE of up to 5.29%.

中文翻译：

用于有机光伏的基于三ide二酰亚胺的中低带隙电子受体

萘二甲酰亚胺由于具有出色的吸收，荧光和出色的吸电子能力，已成为多环芳烃中研究最多的化合物。在这项工作中，我们提出了两个基于ter二酰亚胺的A–D–A型电子受体，并研究了分子内非键构象锁对分子几何形状，固体堆积安排和光伏性能的影响。详细的研究表明，氟原子的引入促进了与相邻噻吩基团上硫元素的非共价相互作用，因此，更平衡的电荷转移和抑制的双分子重组促进了J _SC 和FF，赋予了基于氟化物取代受体的太阳能电池，其PCE高达5.29％。

更新日期：2020-04-03

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