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首页> 外文期刊>Advanced Functional Materials >Polydisperse Aggregates of ZnO Nanocrystallites: A Method for Energy-Conversion-Efficiency Enhancement in Dye-Sensitized Solar Cells
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Polydisperse Aggregates of ZnO Nanocrystallites: A Method for Energy-Conversion-Efficiency Enhancement in Dye-Sensitized Solar Cells

机译：ZnO纳米微晶的多分散聚集体：染料敏化太阳能电池中能量转换效率增强的方法

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摘要

ZnO films consisting of either polydisperse or monodisperse aggregates of nanocrystallites were fabricated and studied as dye-sensitized solar-cell electrodes. The results revealed that the overall energy-conversion efficiency of the cells could be significantly affected by either the average size or the size distribution of the ZnO aggregates. The highest overall energy-conversion efficiency of ～4.4% was achieved with the film formed by polydisperse ZnO aggregates with a broad size distribution from 120 to 360 nm in diameter. Light scattering by the submicrometer-sized ZnO aggregates was employed to explain the improved solar-cell performance through extending the distance travelled by light so as to increase the light-harvesting efficiency of photoelectrode film. The broad distribution of aggregate size provides the ZnO films with both better packing and an enhanced ability to scatter the incident light, and thus promotes the solar-cell performance.
机译：制备了由纳米微晶的多分散或单分散聚集体组成的ZnO薄膜，并将其用作染料敏化太阳能电池电极。结果表明，ZnO聚集体的平均尺寸或尺寸分布会显着影响电池的整体能量转换效率。由多分散的ZnO聚集体形成的膜具有最高的总能量转换效率，约为4.4％，直径在120至360 nm之间。亚微米尺寸的ZnO聚集体的光散射被用来解释通过延长光的行进距离以提高光电极膜的光收集效率而改善的太阳能电池性能。聚集体尺寸的广泛分布为ZnO薄膜提供了更好的堆积性，并增强了散射入射光的能力，从而提高了太阳能电池的性能。

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