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首页> 外文期刊>RSC Advances >Impact of neutral and anion anchoring groups on the photovoltaic performance of triphenylamine sensitizers for dye-sensitized solar cells
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Impact of neutral and anion anchoring groups on the photovoltaic performance of triphenylamine sensitizers for dye-sensitized solar cells

机译：中性和阴离子锚定组对染料敏化太阳能电池三苯胺敏化剂光伏性能的影响

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摘要

Anchor groups play a vital role in dye-sensitized solar cells (DSSCs), acting as a bridge for electron injection from the sensitizers to the metal oxide semiconductor. Carboxylic acids (COOH) are widely used anchors for most sensitizers because of their strong adhesion to the semiconductor surface. Electron injection occurs through this adhesion, which is the main process that initiates the electrical circuit in a DSSC. Owing to the proton (H+) of the COOH anchoring group, the conduction band of the semiconductor is shifted positively after sensitizer adsorption, leading to open circuit photovoltage (V-OC) loss. In this study, the triphenylamine-based sensitizer with a carboxylate group (COO-) was synthesized as an anchor. Although the power conversion efficiency of the anionic triphenylamine sensitized solar cells was lower than that of the neutral-base cell due to the decreased amount of dye on the photo-electrode surface, it exhibited an enhanced VOC compared to that of the neutral form. Density functional theory (DFT) and time dependent DFT studies were also carried out to theoretically characterize the two dyes and explore the difference between the carboxylic and carboxylate anchor groups.
机译：锚群在染料敏化太阳能电池（DSSCs）中发挥着重要作用，作用为从敏化剂到金属氧化物半导体的电子注入电子注入的桥梁。由于其对半导体表面的强粘附，羧酸（COOH）被广泛使用的锚固件用于大多数敏感剂。电子注入通过这种粘附性发生，这是在DSSC中启动电路的主要过程。由于CoOH锚固基团的质子（H +），敏化剂吸附后半导体的导通带呈正换档，导致开路光伏电压（V-OC）损失。在该研究中，合成了用羧酸盐基团（COO-）的三苯胺的敏化剂作为锚。尽管由于光电电极表面上的染料量降低，阴离子三苯胺的功率转换效率低于中性碱基的中性碱基，但是与中性形式相比，它表现出增强的VOC。密度函数理论（DFT）和时间依赖性DFT研究也进行了在理论上表征两种染料并探讨羧酸和羧酸盐锚组之间的差异。

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  • 来源
    《RSC Advances》 |2016年第32期|共9页
  • 作者

    Suresh Thogiti; Chitumalla Ramesh Kumar; Nguyen Thi Hai; Jang Joonkyung; Lee Tae Jin; Kim Jae Hong;

  • 作者单位

    Yeungnam Univ Dept Chem Engn 214-1 Dae Dong Gyongsan 712749 Gyeongbuk South Korea;

    Pusan Natl Univ Dept Nanoenergy Engn Busan 609735 South Korea;

    Yeungnam Univ Dept Chem Engn 214-1 Dae Dong Gyongsan 712749 Gyeongbuk South Korea;

    Pusan Natl Univ Dept Nanoenergy Engn Busan 609735 South Korea;

    Yeungnam Univ Dept Chem Engn 214-1 Dae Dong Gyongsan 712749 Gyeongbuk South Korea;

    Yeungnam Univ Dept Chem Engn 214-1 Dae Dong Gyongsan 712749 Gyeongbuk South Korea;

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  • 正文语种 eng
  • 中图分类 化学;
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