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首页> 外文期刊>RSC Advances >N-Alkylation vs. O-alkylation: influence on the performance of the photovoltaic cells based on a tetracyclic lactam polymer donor
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N-Alkylation vs. O-alkylation: influence on the performance of the photovoltaic cells based on a tetracyclic lactam polymer donor

机译：N-烷基化与O-烷基化：对基于四环内酰胺聚合物供体的光伏电池性能的影响

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Lactam-containing acceptors, which could provide two potential alkylation positions (N-alkylation and O-alkylation), are important building blocks for polymeric donors in high performance polymer solar cells (PSCs). However, the influence of alkylation positions on the PSC performance has seldom been studied. Herein, we investigated the influence of O-alkylation and N-alkylation on a novel bislactam acceptor, namely dibenzonaphthyridinedione (DBND), on the physical properties of the corresponding polymers and hence their PSC performance. Besides O-alkylated and N-alkylated DBND, half-N-alkylated-half-O-alkylated DBND (N,O-DBND) was also prepared and copolymerized with stannyl bithiophene (2T). It was found that by varying the alkylation positions, the optical, crystalline and aggregation properties of the corresponding polymers were greatly altered. In comparison with P(N-DBND-2T) and P(O-DBND-2T), P(N,O-DBND-2T) shows both better solubility and shorter - stacking distance. By blending with PC71BM, P(N,O-DBND-2T) forms better nano-fibrillar phase separation so that less charge recombination is observed, thus leading to a much better power conversion efficiency (PCE) around 5%, which is the highest value of the conjugated system based on N,O-alkylated acceptors. The results show that the asymmetric N,O-alkylation protocol is a promising way to adjust the properties of the bislactam-containing conjugated polymers.
机译：含内酰胺的受体，其可以提供两个潜在的烷基化位置（N-烷基化和O-烷基化），是高性能聚合物太阳能电池（PSC）中的聚合物供体的重要构建块。然而，烷基化位置对PSC性能的影响很少已经研究过。在此，我们研究了O-烷基化和N-烷基化对新型双酰胺酰胺受体的影响，即二苯并萘对相应聚合物的物理性质并因此的PSC性能。除了O-烷基化和N-烷基化DBND之外，还制备了半导体烷基化半烷基化的DBND（N，O-DBND）并与酸尼苯甲酸亚胺（2T）共聚。发现通过改变烷基化位置，大大改变了相应聚合物的光学，结晶和聚集性能。与P（N-DBND-2T）和P（O-DBND-2T）相比，P（N，O-DBND-2T）显示出更好的溶解度和更短的堆叠距离。通过与PC71BM混合，P（N，O-DBND-2T）形成更好的纳米纤维相分离，从而观察到较少的电荷重组，从而导致5％的更好的功率转换效率（PCE），这是最高的5％基于N，O-烷基化受体的共轭系统的值。结果表明，不对称N，O-烷基化方案是调节含双氯酰胺缀合物的缀合物的性质的有希望的方法。

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  • 来源
    《RSC Advances》 |2019年第22期|共9页
  • 作者

    Li Chenchen; Cai Mian; Bao Xichang; Liu Yanfang; Yang Renqiang; Wan Xiaobo;

  • 作者单位

    Jianghan Univ Sch Chem &

    Environm Engn Minist Educ Key Lab Optoelect Chem Mat &

    Devices Wuhan 430056 Hubei Peoples R China;

    Shandong Univ Sci &

    Technol Coll Elect Engn &

    Automat Qingdao 266590 Shandong Peoples R China;

    Chinese Acad Sci Qingdao Inst Bioenergy &

    Bioproc Technol 189 Songling Rd Qingdao 266101 Shandong Peoples R China;

    Chinese Acad Sci Qingdao Inst Bioenergy &

    Bioproc Technol 189 Songling Rd Qingdao 266101 Shandong Peoples R China;

    Chinese Acad Sci Qingdao Inst Bioenergy &

    Bioproc Technol 189 Songling Rd Qingdao 266101 Shandong Peoples R China;

    Jianghan Univ Sch Chem &

    Environm Engn Minist Educ Key Lab Optoelect Chem Mat &

    Devices Wuhan 430056 Hubei Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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