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首页> 外文期刊>RSC Advances >Influence of a co-adsorbent on the performance of bis(diimine) copper(I)-based dye-sensitized solar cells
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Influence of a co-adsorbent on the performance of bis(diimine) copper(I)-based dye-sensitized solar cells

机译：共吸附剂对双（二亚胺）铜（I）基染料敏化太阳能电池性能的影响

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摘要

In the bis(diimine) copper(I) dyes, [Cu(1)(3)](+) and [Cu(1)(4)](+) (1 = ((6,6'-dimethyl-[2,2'-bipyridine]-4,4'-diyl)bis(4,1-phenylene))bis(phosphonic acid), the ancillary ligands 3 and 4 contain sterically demanding second-generation hole-transporting dendrons with methyl or phenyl substituents adjacent to the N-donor atoms of the 2,2'-bipyridine metal-binding domain. The performances of DSCs containing [Cu(1)(3)](+) and [Cu(1)(4)](+) depend on both the solvent (acetone or CH2Cl2) used in the dye-bath and on the presence of a co-adsorbent. Irrespective of solvent, the dye [Cu(1)(4)](+) (6,6'-Ph-2-substituted) only performs well if chenodeoxycholic acid (cheno) is added as a co-adsorbent; for [Cu(1)(3)](+), cheno has a noticeable effect when the dye assembly is carried out in CH2Cl2. Overall, the results indicate that a combination of small 6,6'-substituents in the ancillary ligand and acetone in the dye-dipping cycle lead to the best performing dyes, and for the second-generation dyes, the addition of cheno is essential. Conditions to form TiO2-bound [Cu(1)(5)](+) (5 = 4,4'-bis(4-iodophenyl)-6,6'-dimethyl-2,2'-bipyridine) in a stepwise manner have been optimized and the effects of introducing cheno at different points during the dye-assembly process have been investigated. When cheno is added to the [Cu(MeCN)(4)][PF6]/5 dye-bath, the DSCs exhibit values of J(SC), V-OC and eta values that are similar to those with no co-adsorbent. However, competitive binding of 1 and cheno in the first dipping-cycle leads to lower values of J(SC) and lower photoconversion efficiencies.
机译：在双（二亚胺）铜（I）染料中，[Cu（1）（3）]（+）和[Cu（1）（4）]（+）（1 =（（（6,6'-dimethyl-[ 2,2'-联吡啶] -4,4'-二基）双（4,1-亚苯基））双（膦酸），辅助配体3和4包含具有甲基或苯基的空间需求的第二代空穴传输树突与2,2'-联吡啶金属结合域的N供体原子相邻的取代基。含[Cu（1）（3）]（+）和[Cu（1）（4）]（+）的DSC的性能）取决于染浴中使用的溶剂（丙酮或CH2Cl2）和共吸附剂的存在。染料[Cu（1）（4）]（+）（6,6' -Ph-2-取代的）仅在加入鹅去氧胆酸（cheno）作为助吸附剂时才能发挥良好的性能;对于[Cu（1）（3）]（+），进行染料组装时，chemon具有明显的作用。总体而言，结果表明，在染料浸渍循环中，辅助配体和丙酮中小的6,6'取代基的组合产生了性能最好的染料，而第二代染料，添加cheno是必不可少的。逐步形成TiO2结合的[Cu（1）（5）]（+）的条件（5 = 4,4'-双（4-碘苯基）-6,6'-二甲基-2,2'-联吡啶）优化了这种方式，并研究了在染料组装过程中在不同点引入化学反应的效果。当向[Cu（MeCN）（4）] [PF6] / 5染浴中添加化学螯合剂时，DSC的J（SC），V-OC和eta值类似于无共吸附剂的值。但是，在第一个浸入循环中1和cheno的竞争性结合导致J（SC）的值降低和光转换效率降低。

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