Fluorinated pyrazine-based D–A conjugated polymers for efficient non-fullerene polymer solar cells,Journal of Materials Chemistry A

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Fluorinated pyrazine-based D–A conjugated polymers for efficient non-fullerene polymer solar cells
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020/03/11 , DOI: 10.1039/d0ta00599a
Kai Chen _{1,

2,

3,

4,

5} , Ruijie Ma _{5,

6,

7,

8,

9} , Tao Liu _{5,

6,

7,

8,

9} , Zhenghui Luo _{5,

6,

7,

8,

9} , Xiaopeng Xu _{5,

6,

7,

8,

9} , Qiutang Wang _{1,

2,

3,

4} , Yuzhong Chen _{5,

6,

7,

8,

9} , Yiqun Xiao _{8,

10,

11,

12} , Xinhui Lu _{8,

10,

11,

12} , He Yan _{5,

6,

7,

8,

9}

Affiliation

Over the past decade, fluorinated materials have become the dominant donors for achieving high power conversion efficiencies in organic solar cells (OSCs). Research on F substituents on N-heterocycle-based polymer solar cells was firstly carried out by introduction of the F atom into the pyrazine-based acceptor unit, which was successfully applied in constructing a polymer (BDT-FPY) for PSCs. MeIC-based polymer solar cells (PSCs) with BDT-FPY as a donor achieve a high power conversion efficiency (PCE) of up to 12.30%, significantly higher than that of a device based on BDT-PY:MeIC (the PCE of unfluorinated polymer donor BDT-PY is 10.2%). The higher PCE of BDT-FPY:MeIC is attributed to more balanced μ_h/μ_e, better molecular packing, and more appropriate phase separation features. This result shows great potential for creating high-performance N-heterocycle-based PSCs.

中文翻译：

氟化吡嗪基D–A共轭聚合物，用于高效非富勒烯聚合物太阳能电池

在过去的十年中，氟化材料已成为实现有机太阳能电池（OSC）的高功率转换效率的主要捐助者。首先，通过将F原子引入吡嗪基受体单元中，对N杂环基聚合物太阳能电池上的F取代基进行了研究，并将其成功地用于构建PSC的聚合物（BDT-FPY）。以BDT-FPY为供体的基于MeIC的聚合物太阳能电池（PSC）实现了高达12.30％的高功率转换效率（PCE），远高于基于BDT-PY：MeIC的设备（非氟化PCE）聚合物供体BDT-PY为10.2％）。BDT-FPY：MeIC的较高PCE归因于更平衡的μ _ħ / μ _ë，更好的分子堆积，并且更合适的相分离特征。此结果显示出创建基于N杂环的高性能PSC的巨大潜力。

更新日期：2020-04-15

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