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Impact of strength and size of donors on the optoelectronic properties of D-pi-A sensitizers

机译：供体力量和大小对D-PI-A敏化剂的光电性质的影响

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摘要

A series of carbazole based sensitizers with either phenyl based donors (TBC, TMC, OMC, PC, TBR, TMR, OMR and PR) or aryl amine based donors (OMNC, CNC and HNC) as well as one without a donor group (CC) have been synthesized to understand the influence of the strength of the donor moiety on the optical, electrochemical and photovoltaic properties. Two different acceptor moieties such as cyano acrylic acid and rhodanine acetic acid were introduced and evaluated. Different substituents on the phenyl group have a significant impact on the light harvesting ability of the sensitizers. Among phenyl based donors, anisole based carbazole (OMC) shows the highest short circuit current (JSC) of 4.96 mA cm(-2) with overall power conversion efficiency (PCE) of 2.69%. In the case of the sensitizers with aryl amine based donors, the increasing bulkiness of the donor group lead to increasing open circuit potential. Transient photocurrent and photovoltage measurements signify the importance of a bulky donor fragment in determining the open circuit potential of the dyes. Sensitizers with hexyloxy substituted phenyl amine as the donor group shows a JSC of 6.84 mA cm(-2) with PCE of 3.33%. The overall investigation provides vital information about the influence of donor groups on the optoelectronic properties of the sensitizers for its photovoltaic applications.
机译：一系列基于咔唑的敏化剂，具有苯基的供体（TBC，TMC，OMC，PC，TBR，TMR，OMR和PR）或芳基的基于胺的供体（OMNC，CNC和HNC）以及没有供体组的芳胺（OMNC，CNC和HNC）（CC已经合成以了解供体部分的强度对光学，电化学和光伏性能的影响。引入并评价了两种不同的受体部分，如氰基丙烯酸和罗丹宁乙酸。苯基上的不同取代基对敏化剂的光收获能力产生显着影响。在基于苯基的供体中，α基氨基基咔唑（OMC）表示4.96 mA cm（-2）的最高短路电流（JSC），总功率转换效率（PCE）为2.69％。在具有芳基的芳基的供体的敏化剂的情况下，供体基团的越来越大的膨胀率导致开路电位增加。瞬态光电流和光伏测量表示庞大的捐赠片段在确定染料的开放电路电位时的重要性。具有己氧基取代的苯基胺的敏化剂，作为供体基团的JSC为6.84 mA cm（-2），PCE为3.33％。整体调查提供了有关供体基团对其光伏应用的敏感剂光电性能影响的重要信息。

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  • 来源
    《RSC Advances》 |2016年第44期|共15页
  • 作者

    Sivanadanam J.; Ganesan P.; Gao Peng; Nazeeruddin Md. K.; Emeline Alexei; Bahnemann Detlef; Rajalingam R.;

  • 作者单位

    Bharathidasan Univ Sch Chem Tiruchchirappalli 620024 Tamil Nadu India;

    EPFL Valais Wallis Grp Mol Engn Funct Mat Rue Ind 17 CH-1951 Sion Switzerland;

    EPFL Valais Wallis Grp Mol Engn Funct Mat Rue Ind 17 CH-1951 Sion Switzerland;

    EPFL Valais Wallis Grp Mol Engn Funct Mat Rue Ind 17 CH-1951 Sion Switzerland;

    St Petersburg State Univ Lab Photoact Nanocomposite Mat Ulyanovskaya Str 1 Peterhof St Petersburg 198504 Russia;

    St Petersburg State Univ Lab Photoact Nanocomposite Mat Ulyanovskaya Str 1 Peterhof St Petersburg 198504 Russia;

    Bharathidasan Univ Sch Chem Tiruchchirappalli 620024 Tamil Nadu India;

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  • 正文语种 eng
  • 中图分类 化学;
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