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首页> 外文期刊>Journal of the American Chemical Society >N-Annulated Perylene as An Efficient Electron Donor for Porphyrin-Based Dyes: Enhanced Light-Harvesting Ability and High-Efficiency Co(Ⅱ/Ⅲ)-Based Dye-Sensitized Solar Cells
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N-Annulated Perylene as An Efficient Electron Donor for Porphyrin-Based Dyes: Enhanced Light-Harvesting Ability and High-Efficiency Co(Ⅱ/Ⅲ)-Based Dye-Sensitized Solar Cells

机译：N环Per作为卟啉基染料的高效电子给体：增强的光收集能力和高效的Co（Ⅱ/Ⅲ）基染料敏化太阳能电池

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摘要

Porphyrin-based dyes recently have become good candidates for dye-sensitized solar cells (DSCs). However, the bottleneck is how to further improve their light-harvesting ability. In this work, N-annulated perylene (NP) was used to functionalize the Zn-porphyrin, and four "push-pull"-type NP-substituted and fused porphyrin dyes with intense absorption in the visible and even in the near-infrared (NIR) region were synthesized. Co(Ⅱ/Ⅲ)-based DSC device characterizations revealed that dyes WW-5 and WW-6, in which an ethynylene spacer is incorporated between the NP and porphyrin core, showed pantochromatic photon-to-current conversion efficiency action spectra in the visible and NIR region, with a further red-shift of about 90 and 60 nm, respectively, compared to the benchmark molecule YD2-o-C8. As a result, the short-circuit current density was largely increased, and the devices displayed power conversion efficiencies as high as 10.3% and 10.5%, respectively, which is comparable to that of the YD2-o-C8 cell (η = 10.5%) under the same conditions. On the other hand, the dye WW-3 in which the NP unit is directly attached to the porphyrin core showed a moderate power conversion efficiency (η = 5.6%) due to the inefficient π-conjugation, and the NP-fused dye WW-4 exhibited even poorer performance due to its low-lying LUMO energy level and nondisjointed HOMO/LUMO profile. Our detailed physical measurements (optical and electrochemical), density functional theory calculations, and photovoltaic characterizations disclosed that the energy level alignment, the molecular orbital profile, and dye aggregation all played very important roles on the interface electron transfer and charge recombination kinetics.
机译：最近，基于卟啉的染料已成为染料敏化太阳能电池（DSC）的良好候选者。然而，瓶颈在于如何进一步提高其光采集能力。在这项工作中，使用N环per（NP）对Zn-卟啉进行功能化，并使用了四种“推挽”型NP取代和稠合的卟啉染料，它们在可见光甚至近红外光中都有强吸收性（合成了NIR）区域。基于Co（Ⅱ/Ⅲ）的DSC器件表征表明，染料WW-5和WW-6在NP和卟啉核之间掺入了乙炔间隔基，在可见光下显示了全色光子-电流转换效率作用谱。与基准分子YD2-o-C8相比，它们分别具有约90和60 nm的红移。结果，短路电流密度大大提高，并且器件的功率转换效率分别高达10.3％和10.5％，与YD2-o-C8电池的功率转换效率相当（η= 10.5％） ）。另一方面，由于π共轭效率低，其中NP单元直接连接在卟啉核上的染料WW-3显示了中等的功率转换效率（η= 5.6％），而NP融合染料WW-由于其低的LUMO能级和不脱节的HOMO / LUMO轮廓，图4的性能甚至更差。我们详细的物理测量（光学和电化学），密度泛函理论计算和光伏表征表明，能级排列，分子轨道轮廓和染料聚集都在界面电子转移和电荷复合动力学中起着非常重要的作用。

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  • 来源
    《Journal of the American Chemical Society》 |2014年第1期|265-272|共8页
  • 作者

    Jie Luo; Mingfei Xu; Renzhi Li; Kuo-Wei Huang; Changyun Jiang; Qingbiao Qi; Wangdong Zeng; Jie Zhang; Chunyan Chi; Peng Wang; Jishan Wu;

  • 作者单位

    Institute of Materials Research and Engineering, A~*STAR, 3 Research Link, Singapore, 117602;

    State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China;

    State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China;

    Division of Physical and Life Sciences and Engineering and KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia;

    Institute of Materials Research and Engineering, A~*STAR, 3 Research Link, Singapore, 117602;

    Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore;

    Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore;

    Institute of Materials Research and Engineering, A~*STAR, 3 Research Link, Singapore, 117602;

    Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore;

    State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China;

    Institute of Materials Research and Engineering, A~*STAR, 3 Research Link, Singapore, 117602,Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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