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首页> 外文期刊>Journal of power sources >Y-shaped organic dyes with D2-π-A configuration as efficient co-sensitizers for ruthenium-based dye sensitized solar cells
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Y-shaped organic dyes with D2-π-A configuration as efficient co-sensitizers for ruthenium-based dye sensitized solar cells

机译：Y形有机染料，具有D2-π-A构型，作为钌基染料的高效共敏化剂敏化太阳能电池

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摘要

Three new Y-shaped organic dyes, coded CD1-3, have been synthesized for dye-sensitized solar cells (DSSCs). They have a D2-pi -A configuration and been molecularly engineered to modulate the spectral properties and energy levels. For comparison, a D-pi -A type sensitizer with one donor group (CD4) is synthesized as well. We have performed a combined experimental and theoretical investigation of their optical, electrochemical, photovoltaic, geometrical and electronic characteristics. These new Y-shaped dyes display intensive UV-vis absorption with high molar extinction coefficients. So their roles as co-sensitizers for ruthenium-based DSSCs are further evaluated. As a consequence, the co-sensitized devices exhibit improved power conversion efficiencies (PCEs) in the range of 7.24-7.96% due to the enhanced short-circuit photocurrents (Jsc) and open-circuit voltages (Voc), which are higher than the DSSCs sensitized with N719 (PCE = 6.75%) or Z907 (PCE = 6.55%) alone. In addition, the mechanisms of these improvements have been elucidated by incident photon to current efficiency (IPCE) and electrochemical impedance spectroscopy (EIS) studies. The Jsc is improved because CD1-3 can compensate for the photocurrent loss by I-/I3; while the Voc is enhanced because the electron recombination process is retarded by these Y-shaped dyes upon co-sensitization.commentSuperscript/Subscript Available/comment
机译：已经合成了三种新的Y形有机染料，编码CD1-3，用于染料敏化太阳能电池（DSSCs）。它们具有D2-PI -A配置，并进行了分子设计以调节光谱性能和能量水平。为了比较，也合成了具有一种供体组（CD4）的D-PI -A型敏化剂。我们对其光学，电化学，光伏，几何和电子特性进行了组合的实验和理论研究。这些新的Y形染料显示出具有高摩尔消光系数的密集UV-Vis吸收。因此，进一步评估它们作为基于钌的DSSC的共同敏化剂的角色。因此，由于增强的短路光电流（JSC）和高电路电压（VOC），共敏化器件在7.24-7.96％的范围内表现出改善的功率转换效率（PCE）。单独使用N719（PCE = 6.75％）或Z907（PCE = 6.55％）敏化的DSSCs。此外，通过事件光子对电流效率（IPCE）和电化学阻抗光谱（EIS）研究，已经阐明了这些改进的机制。 JSC得到改善，因为CD1-3可以通过I-/ I3补偿光电流损耗;当VOC增强时，因为在共同敏化时通过这些Y形染料延迟了电子复合过程。<评论>上标/下标的可用

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  • 来源
    《Journal of power sources》 |2021年第1期|228952.1-228952.8|共8页
  • 作者

    Jin Lingxia; Shi Shengnan; Zhao Caibin; Yu Xiaohu; Lu Jiufu; Wang Qin; Wei Yawen;

  • 作者单位

    Shaanxi Univ Technol Sch Chem & Environm Sci Shaanxi Key Lab Catalysis Hanzhong 723001 Shaanxi Peoples R China;

    Shaanxi Univ Technol Sch Chem & Environm Sci Shaanxi Key Lab Catalysis Hanzhong 723001 Shaanxi Peoples R China;

    Shaanxi Univ Technol Sch Chem & Environm Sci Shaanxi Key Lab Catalysis Hanzhong 723001 Shaanxi Peoples R China;

    Shaanxi Univ Technol Sch Chem & Environm Sci Shaanxi Key Lab Catalysis Hanzhong 723001 Shaanxi Peoples R China;

    Shaanxi Univ Technol Sch Chem & Environm Sci Shaanxi Key Lab Catalysis Hanzhong 723001 Shaanxi Peoples R China;

    Shaanxi Univ Technol Sch Chem & Environm Sci Shaanxi Key Lab Catalysis Hanzhong 723001 Shaanxi Peoples R China;

    Changan Univ Inst Publicat Sci Xian 710064 Shaanxi Peoples R China;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Dye sensitized solar cells; Y-shaped; D2-pi-A configuration; Molar extinction coefficient; Co-sensitization;

    机译：染料敏化太阳能电池;y形;d2-pi-a配置;摩尔消光系数;共同敏化;

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