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Synthesis of novel ruthenium sensitizers and their application in dye-sensitized solar cells

机译：新型钌敏化剂的合成及其在染料敏化太阳能电池中的应用

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Ruthenium(II) complexes [Ru(L_2)(NCS)_2] (K8) and [Ru(L)(L~9)(NCS)_2] (K9) (where L = 4,4′-bis(carboxyvinyl)-2,2′-bipyridine and L~9=4,4′-dinonyl-2,2′-bipyridine) were synthesized and characterized by spectroscopic and electrochemical techniques. The performance of K8 and K9 complexes as charge transfer photosensitizers in nanocry stalline TiO_2 based solar cells was investigated. These complexes when anchored onto TiO_2 films exhibit very efficient sensitization yielding 75 ± 5% incident photon-to-current efficiencies (IPCE) in the visible region using an electrolyte consisting of 0.6 M methyl-N-butyl imidazolium iodide, 0.05 M iodine, 0.1 M LiI and 0.5 M tert-butylpyridine in 50/50 (v/v) mixture of valeronitrile and acetonitrile. At one sun the K8 complex gave a short circuit photocurrent density of 18 ± 0.5 mA/cm~2, the open circuit voltage 640 ± 50 mV and fill factor of 0.75 ± 0.05, corresponding to an overall conversion efficiency of 8.64 ±0.5%. Under similar conditions, the K9-sensitized solar cell gave a photocurrent density of 16.5 ± 0.5 mA/cm~2, 666 ± 50 mV open circuit potential and 0.71 ± 0.05 fill factor yielding 7.81% ± 0.6% efficiency.
机译：钌（II）络合物[Ru（L_2）（NCS）_2]（K8）和[Ru（L）（L〜9）（NCS）_2]（K9）（其中L = 4,4'-双（羧基乙烯基）合成了-2,2'-联吡啶和L〜9 = 4,4'-二壬基-2,2'-联吡啶），并通过光谱和电化学技术对其进行了表征。研究了K8和K9络合物作为纳米转移的TiO 2基太阳能电池中电荷转移光敏剂的性能。这些配合物在锚定到TiO_2薄膜上时表现出非常有效的敏化作用，使用由0.6 M甲基-N-丁基咪唑碘化物，0.05 M碘，0.1组成的电解质在可见光区域产生75±5％的入射光子电流效率（IPCE）。在戊腈和乙腈的50/50（v / v）混合物中的M LiI和0.5 M叔丁基吡啶。一天阳光下，K8络合物的短路光电流密度为18±0.5 mA / cm〜2，开路电压为640±50 mV，填充系数为0.75±0.05，对应的总转换效率为8.64±0.5％。在相似条件下，K9敏化太阳能电池的光电流密度为16.5±0.5 mA / cm〜2，开路电位为666±50 mV，填充系数为0.71±0.05，产生的效率为7.81％±0.6％。

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