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首页> 外文期刊>American Journal of Analytical Chemistry >Electrochemical Characterization of Rapid Discharge Sintering (RDS) NiO Cathodes for Dye-Sensitized Solar Cells of p-Type
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Electrochemical Characterization of Rapid Discharge Sintering (RDS) NiO Cathodes for Dye-Sensitized Solar Cells of p-Type

机译：p型染料敏化太阳能电池快速放电烧结（RDS）NiO阴极的电化学特性

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摘要

Nickel oxide (NiO) thin films with thickness ranging in the interval 0.2 - 3.5 μm have been deposited onto conductive transparent substrate via the method of plasma-assisted rapid discharge sintering (RDS) with microwave heating starting from NiO nanoparticles with diameter 50 nm. The optical and electrochemical properties of the RDS NiO films in the pristine state were characterized in non aqueous electrolyte with the solvent 3-methoxy-propionitrile (3-MPN). Upon electrochemical cycling of NiO in 3-MPN we observed two characteristic oxidation peaks referring to the two nickel centred processes Ni(II)→Ni(III) and Ni(III)→Ni(IV), which are both localized prevalently on the surface of the metallic oxide. The oxide films prepared with the RDS method were also sensitized with different types of commercial dyes, either organometallic (N719, black dye) or organic (squaraine 2, erythrosine B), to compare the corresponding p-type dye-sensitized solar cells (p-DSCs). All dyes here employed matched the energies of their frontier orbitals with the upper edge of NiO valence band and the redox level of the triiodide/iodide couple. The comparison of the performances of the p-DSCs based on RDS NiO which differed exclusively for the nature of the sensitizer showed that the extent of electronic conjugation in the structure of the dye is crucial for the control of the photovoltaic performance of the corresponding p-DSC.
机译：通过等离子体辅助快速放电烧结（RDS）的方法，从直径50 nm的NiO纳米颗粒开始，通过微波加热，将厚度在0.2-3.5μm之间的氧化镍（NiO）薄膜沉积到导电透明基板上。在具有溶剂3-甲氧基-丙腈（3-MPN）的非水性电解质中，对RDS NiO薄膜在原始状态下的光学和电化学性质进行了表征。 NiO在3-MPN中的电化学循环后，我们观察到两个特征性的氧化峰，这是两个镍中心过程Ni（II）→Ni（III）和Ni（III）→Ni（IV），它们都普遍存在于表面金属氧化物。用RDS方法制备的氧化膜还用不同类型的市售染料敏化，无论是有机金属（N719，黑色染料）还是有机染料（方酸2，赤藓红B），以比较相应的p型染料敏化太阳能电池（p -DSC）。这里使用的所有染料都将其前沿轨道的能量与NiO价带的上边缘和三碘化物/碘化物对的氧化还原水平相匹配。比较基于RDS NiO的p-DSC的性能，该性能仅因敏化剂的性质而不同，这表明染料结构中电子共轭的程度对于控制相应p-DSC的光伏性能至关重要。 DSC。

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