Immolization of Silver Nanoparticles by Peptide Nucleic Acids in Surface Plasmon Enhanced Dye-Sensitized Solar Cells
Immolization of Silver Nanoparticles by Peptide Nucleic Acids in Surface Plasmon Enhanced Dye-Sensitized Solar Cells
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表面等离子体增强染料敏化太阳能电池中肽核酸对银纳米颗粒的固定化
DOI：
10.1149/2.006402jss
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发表时间：
2014
影响因子：
2.2
通讯作者：
and M.Ihara
中科院分区：
文献类型：
--
作者：
N.Loew;S.Ikenouchi;and M.Ihara
银纳米粒子（AgNPs）的局部表面等离子体可以增加染料分子的光吸收，这可以用来增强染料敏化太阳能电池（DSSCs）的光电流产生。同时，从tio2工作电极到i3 - /I -电解质的反电子转移也增加了。在这项工作中，肽核酸（PNA）成功地固定AgNPs在不同距离的二氧化钛层和染料分子。结合前人的研究结果，本文的研究结果表明，可能弯曲的2 nm烷烃-硫醇的长度与3.2 ~ 4.2 nm PNA的长度之间是最佳的距离。用这种长度的PNA杂交固定化AgNPs后，能量转换效率从3.1%提高到4.0%。此外，PNA在杂化过程中形成π-电子堆栈，可以减少反向电子转移。当双链PNA长度为5.8 ~ 6.8 nm时，DSSCs的内部量子效率可从73%提高到88%，提高10%以上。
Light absorption of dye molecules can be increased by the localized surface plasmons of silver nanoparticles (AgNPs), which can be used to enhance the photocurrent generation of dye-sensitized solar cells (DSSCs). Simultaneously, however, reverse electron transfer from the TiO 2 working electrode to the I 3−/I− electrolyte is also increased. In this work, peptide nucleic acid (PNA) was successfully used to immobilize AgNPs at different distances from the TiO 2 layer and dye molecules. Together with results from previous studies, results here reveal that the optimal distance is between the lengths of possibly bent 2-nm alkane-thiols and 3.2-to 4.2-nm PNA. AgNPs immobilized by hybridization of PNA of this length lead to an increase in energy conversion efficiency from 3.1% to 4.0%. Furthermore, PNA forms π-electron stacks upon hybridization, which can reduce reverse electron transfer. With double-stranded PNA, the internal quantum efficiency of DSSCs could be increased more than 10%, from 73% to 88%, with 5.8-to 6.8-nm long double-stranded PNA.