• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Non-halogenated-solvent-processed highly efficient organic solar cells with a record open circuit voltage enabled by noncovalently locked novel polymer donors
【24h】

Non-halogenated-solvent-processed highly efficient organic solar cells with a record open circuit voltage enabled by noncovalently locked novel polymer donors

机译：非卤化 - 溶剂加工高效的有机太阳能电池，具有非共价锁定的新型聚合物供体的记录开路电压

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The relatively low open circuit voltage (V-oc) of organic solar cells (OSCs) with narrow and ultra-narrow bandgap fused-ring electron acceptors limits further improvement of the OSCs. Simply down-shifting the highest occupied molecular orbital (HOMO) levels of the donors always results in the trade-off between the V-oc and short circuit current (J(sc)). In this work, we reported three novel noncovalently locked polymer donors based on different side-chain-modified benzodithiophene (BDT) units alternately copolymerized with an electron-deficient 3,3 '-dicarboxylate-substituted difluorotetrathiophene building block for efficient OSCs. Due to the existence of the electron-affinity moiety, deep HOMO levels are obtained for these copolymer donors, enabling the highest recorded V-oc of 0.99 V when blended with the IT-4F acceptor. Meanwhile, intramolecular noncovalent interactions in these copolymers favor a preferential face-on orientation. Efficient charge transport and exciton dissociation under a low driving force are observed in these novel polymer donors. Consequently, the device processed from a non-halogenated solvent shows a high efficiency of 12.5% with simultaneously high V-oc and J(sc), which is one of the highest performances of non-halogenated-solvent-processed OSCs to date. These results demonstrate that the synergistic effect of the energy band structure and molecular geometry can provide an effective molecular design strategy for high performance OSCs.
机译：具有窄和超窄的带隙熔断环电子受体的有机太阳能电池（OSC）的相对低的开路电压（V-OC）限制了OSC的进一步改善。简单地下移送料的最高占用的分子轨道（HOMO）水平总是导致V-OC和短路电流之间的折衷（J（SC））。在这项工作中，我们报道了基于不同侧链改性的苯二噻吩（BDT）单元的三种新型非共价锁定的聚合物供体，交替地与电子缺陷的3,3'-二羧酸甲酯取代的Difluorotethathathathathathisophene构建块用于有效OSC。由于电子亲和力部分的存在，得到了这些共聚物供体的深层均匀水平，当与IT-4F受体混合时，使得最高记录的V-OC为0.99V。同时，这些共聚物的分子内非共价相互作用赞成优先面对方向。在这些新的聚合物供体中观察到在低驱动力下的高效电荷传输和激子解离。因此，由非卤化溶剂处理的装置显示出高效率为12.5％，同时高V-oc和j（sc），其是迄今为止的非卤化 - 溶剂加工的OSC的最高性能之一。这些结果表明，能带结构和分子几何形状的协同效应可以为高性能OSC提供有效的分子设计策略。

著录项

  • 来源
  • 作者

    Guo Hui; Zhang Youdi; Chen Lie; Liao Xunfan; Xie Qian; Cui Yongjie; Huang Bin; Yang Changduk; Chen Yiwang;

  • 作者单位

    Nanchang Univ IPEC Coll Chem Nanchang 330031 Jiangxi Peoples R China;

    Nanchang Univ IPEC Coll Chem Nanchang 330031 Jiangxi Peoples R China;

    Nanchang Univ IPEC Coll Chem Nanchang 330031 Jiangxi Peoples R China;

    Donghua Univ Coll Mat Sci &

    Engn State Key Lab Modificat Chem Fibers &

    Polymer Mat 99 Renmin Bei Rd Shanghai 201620 Peoples R China;

    Nanchang Univ IPEC Coll Chem Nanchang 330031 Jiangxi Peoples R China;

    Donghua Univ Coll Mat Sci &

    Engn State Key Lab Modificat Chem Fibers &

    Polymer Mat 99 Renmin Bei Rd Shanghai 201620 Peoples R China;

    Nanchang Univ IPEC Coll Chem Nanchang 330031 Jiangxi Peoples R China;

    UNIST Low Dimens Carbon Mat Ctr Perovtron Res Ctr Dept Energy Engn Sch Energy &

    Chem Engn 50 UNIST Gil Ulsan 44919 South Korea;

    Nanchang Univ IPEC Coll Chem Nanchang 330031 Jiangxi Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号