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首页> 外文期刊>Advanced Functional Materials >Polymer Solar Cells Exceeding 10% Efficiency Enabled via a Facile Star-Shaped Molecular Cathode Interlayer with Variable Counterions
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Polymer Solar Cells Exceeding 10% Efficiency Enabled via a Facile Star-Shaped Molecular Cathode Interlayer with Variable Counterions

机译：通过具有可变抗衡离子的简便星形分子阴极中间层，聚合物太阳能电池的效率超过10％

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摘要

A series of star-shaped small molecular cathode interlayer materials are synthesized for PTB7:PC71BM based polymer solar cells (PSCs), comprising neutral amino groups, quaternary ammonium ions, amino N-oxides, and sulfobetaine ions as pendant polar functionalities, respectively. For the first time, the effect of these different pendant functional groups with or without mobile counterions on the cells' photovoltaic properties is investigated in detail. A large improvement in device performance is observed by inserting these cathode interfacial layers (CILs) between the PTB7:PC71BM active layer and the Al electrode. The CILs could effectively lower the work function of the Al cathode, increase the built-in potential, and decrease the series resistance of the related PSCs. poly(9,9-dioctylfluorene-co-N-[4-(3-methyl-propyl)]-diphenylamine) with pendant quaternary ammonium ions shows the best cathode modification ability, giving rise to the highest power conversion efficiency of 10.1%, even better than that of the typical poly[(9,9-bis(3'-(N, N-dimethylamino) propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)] based device. The design strategy and structure-property relationships concluded in this work will be helpful to develop more efficient cathode interface materials for high-performance PSCs in the future.
机译：合成了一系列基于PTB7：PC71BM的聚合物太阳能电池（PSC）的星形小分子阴极夹层材料，这些材料分别包含中性氨基，季铵离子，氨基N-氧化物和磺基甜菜碱离子作为侧链极性官能团。首次详细研究了带有或不带有移动抗衡离子的这些不同侧基官能团对电池光伏性能的影响。通过将这些阴极界面层（CIL）插入PTB7：PC71BM有源层和Al电极之间，可以观察到器件性能的大幅改善。 CIL可以有效降低Al阴极的功函数，增加内建电势，并降低相关PSC的串联电阻。具有侧挂季铵离子的聚（9,9-二辛基芴-co-N- [4-（3-甲基-丙基）]-二苯胺）显示出最佳的阴极改性能力，从而产生了最高的10.1％的功率转换效率，甚至比典型的聚[（9,9-双（3'-（N，N-二甲基氨基）丙基）-2,7-芴）-alt-2,7-（9,9-二辛基芴）]更好基于设备。在这项工作中得出的设计策略和结构-性能关系将有助于将来为高性能PSC开发更有效的阴极界面材料。

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  • 来源
    《Advanced Functional Materials》 |2016年第26期|4643-4652|共10页
  • 作者

    Wang Zhenguo; Li Zuojia; Xu Xiaopeng; Li Ying; Li Kai; Peng Qiang;

  • 作者单位

    Sichuan Univ, Coll Chem, Key Lab Green Chem & Technol, Minist Educ, Chengdu 610064, Peoples R China|Sichuan Univ, State Key Lab Polymer Mat Engn, Chengdu 610064, Peoples R China;

    Sichuan Univ, Coll Chem, Key Lab Green Chem & Technol, Minist Educ, Chengdu 610064, Peoples R China|Sichuan Univ, State Key Lab Polymer Mat Engn, Chengdu 610064, Peoples R China;

    Sichuan Univ, Coll Chem, Key Lab Green Chem & Technol, Minist Educ, Chengdu 610064, Peoples R China|Sichuan Univ, State Key Lab Polymer Mat Engn, Chengdu 610064, Peoples R China;

    Sichuan Univ, Coll Chem, Key Lab Green Chem & Technol, Minist Educ, Chengdu 610064, Peoples R China|Sichuan Univ, State Key Lab Polymer Mat Engn, Chengdu 610064, Peoples R China;

    Sichuan Univ, Coll Chem, Key Lab Green Chem & Technol, Minist Educ, Chengdu 610064, Peoples R China|Sichuan Univ, State Key Lab Polymer Mat Engn, Chengdu 610064, Peoples R China;

    Sichuan Univ, Coll Chem, Key Lab Green Chem & Technol, Minist Educ, Chengdu 610064, Peoples R China|Sichuan Univ, State Key Lab Polymer Mat Engn, Chengdu 610064, Peoples R China;

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