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Stability of ruthenium/organic dye co-sensitized solar cells: a joint experimental and computational investigation

机译:钌/有机染料共敏化太阳能电池的稳定性:联合实验和计算研究

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We carried out a joint experimental and theoretical study of the stability of dye-sensitized solar cells using a mixture of black dye (N749) and a Y1 organic co-adsorbent. The aim of this work was to investigate the stability of these highly efficient sensitizers. The co-sensitized device showed remarkable stability under the conditions investigated (1100 h of about 1 Sun light soaking at 55 degrees C). The partial desorption of the organic co-adsorbent was identified as a possible cause of the slight reduction in the photocurrent value. Theoretical investigations on the dye-sensitized semiconductor surface using DFT methods showed a considerably lower adsorption energy for Y1 compared with N749, in particular upon oxidation, possibly leading to desorption of the dye under working conditions. The devices using only the Y1 organic dye consistently showed a considerably lower stability.
机译:我们使用黑色染料(N749)和Y1有机共吸附剂的混合物对染料敏化太阳能电池的稳定性进行了联合实验和理论研究。这项工作的目的是研究这些高效敏化剂的稳定性。在研究的条件下(约55摄氏度的1个太阳光浸泡1100小时),该共增感器件显示出显着的稳定性。有机共吸附剂的部分脱附被确定为光电流值略微降低的可能原因。使用DFT方法对染料敏化的半导体表面进行的理论研究表明,与N749相比,Y1的吸附能量要低得多,特别是在氧化时,可能导致染料在工作条件下解吸。仅使用Y1有机染料的设备始终显示出较低的稳定性。

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