Comparison of Dye- and Semiconductor-Sensitized Porous Nanocrystalline Liquid Junction Solar Cells
Comparison of Dye- and Semiconductor-Sensitized Porous Nanocrystalline Liquid Junction Solar Cells
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DOI：
10.1021/jp803310s
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发表时间：
2008-11-20
影响因子：
3.7
通讯作者：
Hodes, Gary
中科院分区：
文献类型：
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作者：
Hodes, Gary
液体结染料敏化太阳能电池（DSSC）已达到11%的实验室太阳能效率。相比之下，到目前为止，荧光素致敏类似物（SSSC）的最大效率为2.8%。这就引出了一个问题：这种差异是根本性的吗？SSSC是否总是低于DSSC？我们讨论了两种类型的细胞之间的差异，考虑到典型的电荷转移时间的各种电流产生和复合过程。三个主要因素，可能有助于这两种类型的细胞之间的差异进行了讨论：多层的吸收半导体的氧化物，通常用于两种类型的电池的不同的电解质，和电荷陷阱中的吸收半导体。熵效应和不可逆的电子注入的性质，通常使用的钌染料的二氧化钛也被简要考虑。我们的结论是，虽然DSSC确实具有一些基本的优势，我们可以期待SSSC的效率大幅提高，可能达到的值相媲美的DSSC。
The liquid junction dye-sensitized solar cell (DSSC) has reached laboratory solar efficiencies of 11%. In contrast, the semiconductor-sensitized analogue (SSSC) has, up to now, exhibited a maximum efficiency of 2.8%. This begs the questions: is this difference fundamental? Will SSSCs always be inferior to DSSCs? We discuss the differences between the two types of cells, considering typical charge transfer times for the various current generating and recombination processes. Three main factors that could contribute to differences between the two types of cells are discussed: multiple layers of absorbing semiconductor on the oxide, the different electrolytes normally used for the two types of cell, and charge traps in the absorbing semiconductor. Entropic effects and the irreversible electron injecting nature of the normally used Ru dye to TiO2 are also briefly considered. We conclude that although the DSSC does possess some fundamental advantages, we can expect large improvements in efficiency of the SSSC, possibly reaching values comparable to the DSSC.