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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >CdSe Quantum Dot-Sensitized Solar Cells Exceeding Efficiency 1% at Full-Sun Intensity
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CdSe Quantum Dot-Sensitized Solar Cells Exceeding Efficiency 1% at Full-Sun Intensity

机译：CdSe量子点敏化太阳能电池在全日照强度下的效率超过1％

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摘要

Colloidal cadmium selenide (CdSe) quantum dots (QDs) have been prepared and exploited as inorganic dyes to sensitize a large-band-gap TiO2 layer for QD-sensitized solar cells. The optimized QD-sensitized solar cells exhibited an unprecedented incident photon-to-charge carrier generation efficiency of 36% and an overall conversion efficiency of over 1.7% at 0.1 sun and 1% at full sun intensity with a cobalt(II/III)-based redox system. The photovoltaic characteristics of CdSe QD-sensitized cells are compared with standard dye-sensitized solar cells, in which the former exhibited about half of the efficiency of the latter. From the kinetics of charge transfer monitored using transient spectroscopic and voltage decay measurements in the CdSe QD-sensitized cell, the regeneration yield of oxidized QDs was found to be close to almost unity, and the electron lifetime was longer in the CdSe QD-sensitized cell than in the dye-sensitized solar cell.
机译：已经制备了胶体硒化镉（CdSe）量子点（QD），并用作无机染料来敏化用于QD敏化太阳能电池的大带隙TiO2层。经过优化的QD敏化太阳能电池展现出前所未有的入射光子-电荷载流子产生效率，达到36％，在钴（II / III）-下，在0.1个太阳光下的总转换效率超过1.7％，在全太阳光下的总转换效率超过1％基于氧化还原系统。将CdSe QD敏化电池的光伏特性与标准染料敏化太阳能电池进行比较，其中前者显示出后者效率的一半左右。通过在CdSe QD致敏电池中使用瞬态光谱和电压衰减测量监测的电荷转移动力学，发现氧化QD的再生收率几乎接近单位，并且在CdSe QD致敏电池中电子寿命更长比染料敏化太阳能电池

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