UV Filtering of Dye-Sensitized Solar Cells: The Effects of Varying the UV Cut-Off upon Cell Performance and Incident Photon-to-Electron Conversion Efficiency
UV Filtering of Dye-Sensitized Solar Cells: The Effects of Varying the UV Cut-Off upon Cell Performance and Incident Photon-to-Electron Conversion Efficiency
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DOI：
10.1155/2012/506132
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发表时间：
2012
影响因子：
3.2
通讯作者：
Matthew J. Carnie;T. Watson;D. Worsley
中科院分区：
文献类型：
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作者：
Matthew J. Carnie;T. Watson;D. Worsley
以目前的技术，紫外线过滤器是必不可少的，以确保长期染料敏化太阳能电池（DSC）的稳定性。然而，阻挡光子将对器件性能和入射光子-电流转换效率（IPCE）产生明显影响。滤波器已应用于具有一定截止波长范围的DSC器件，以评估不同级别的滤波如何影响由三种不同染料（即N719、Z907和N749）制成的器件的性能和IPCE。结果表明，与作用光谱较窄的染料相比，将其IPCE进一步扩展到近红外区域的染料由于紫外过滤而遭受的相对效率损失较小。此外，这些结果对那些致力于DSC技术工业化的人来说是鼓舞人心的。从所提出的结果可以估计，在旨在防止TiO2半导体直接带隙激发的水平上进行滤波，在正向照明器件中应导致电池效率的相对下降不超过10%，在反向照明器件中不超过2%。
With current technology, UV filters are essential to ensure long-term dye-sensitized solar cell (DSC) stability. Blocking photons, however, will have an obvious effect on device performance and upon its incident photon-to-current conversion efficiency (IPCE). Filters have been applied to DSC devices with a range of cut-off wavelengths in order to assess how different levels of filtering affect the performance and IPCE of devices made with three different dyes, namely N719, Z907, and N749. It is shown that dyes that extend their IPCE further into the NIR region suffer lesser relative efficiency losses due to UV filtering than dyes with narrower action spectra. Furthermore, the results are encouraging to those working towards the industrialisation of DSC technology. From the results presented it can be estimated that filtering at a level intended to prevent direct band gap excitation of the TiO2 semiconductor should cause a relative drop in cell efficiency of no more than 10% in forward illuminated devices and no more than 2% in reverse illuminated devices.