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Synthesis of ruthenium complex and its application in dye-sensitized solar cells

机译:钌配合物的合成及其在染料敏化太阳能电池中的应用

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摘要

An amphiphilic bipyridyl ligand, 4,4'-dicarboxy-octyl-2,2'-bipyridine, and its ruthenium(□) complex (termed as S8) were synthesized and characterized by UV/Vis, IR and NMR spectroscopy. The performance of this S8 complex as charge transfer photo-sensitizer in TiO2-based dye-sensitized solar cells was studied under standard AM 1.5 sunlight and by using an electrolyte consisting of 0.70 M 1,2-dimethyl-3-propyl-imidazolium iodide, 0.10 M Lil, 40 mM iodine and 0.125 M 4-tert-butylpyridine in acetonitrile. Aliphatic chains linking to carboxylate groups of S8 act as an effective electron donor and carboxylate groups act as an effective electron withdrawing between the TiO2 layer and the carboxylate linking TiO2 layer leading to increasing of electron density at this interface, which is attributed to increasing efficiency of electron injection to the TiO2 conduction band from the excited state of dye. The complex, S8, gave a photocurrent density of 13.02 mA/cm~2,0.60 V open circuit voltage and 0.69 fill factor yielding 5.36% efficiency. The S8 dye with aliphatic chain improved conversion efficiency of the resulting DSSCs compared with a cell fabricated using the N3 dye.
机译:合成了两亲性联吡啶配体4,4'-二羧基-辛基-2,2'-联吡啶及其钌(□)配合物(称为S8),并通过UV / Vis,IR和NMR光谱进行了表征。在标准AM 1.5阳光下,通过使用由0.70 M 1,2-二甲基-3-丙基咪唑碘化物组成的电解质,研究了这种S8络合物在TiO2基染料敏化太阳能电池中作为电荷转移光敏剂的性能,乙腈中的0.10 M Lil,40 mM碘和0.125 M 4-叔丁基吡啶连接到S8的羧基的脂族链充当有效的电子给体,而羧基作用在TiO2层和连接羧酸盐的TiO2层之间,作为有效的电子吸收,导致该界面处的电子密度增加,这归因于提高了S2的效率。电子从染料的激发态注入到TiO2导带。配合物S8的光电流密度为13.02 mA / cm〜2,0.60 V开路电压,填充因子为0.69,效率为5.36%。与使用N3染料制造的电池相比,具有脂族链的S8染料提高了所得DSSC的转化效率。

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