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Abstract：
Dye-sensitized solar cells (DSSCs) have been one of the most promising technologies to convert sunlight into electricity repeatedly based on the mechanism that dyes inject/accept electron into the metal oxides/from redox mediator. Specifically, N719 ([RuL2(NCS)2], L: 4,4\'-dicarboxy-2,2\'-bipyridine), immobilized on TiO2 through the interaction between its ligands (-COO- and -NCS) and the oxygen on the TiO2 surface, has been used as a conventional DSSC dye with high voltage. Nevertheless, -NCS ligands have been removed from Ru2+ in N719 due to UV irradiation and exchanged with H2O or OH- in electrolyte, resulting in voltage drop. In this work, we developed the first DSSC using the N719-adsorbed Eggshell (ESM)-TiO2 composite to maintain the immobilization of N719 on TiO2 through electrostatic interaction between the protein of ESM and N719. The DSSC using the composite maintained the voltage even after 12 h light irradiation, although the voltage of DSSC without ESM dropped drastically. It means that the ESM contributed to stable photovoltaic performances of DSSCs through the protection of NCS ligands of N719.
摘要：
染料敏化太阳能电池（DSSC）是最有前途的技术之一，可以基于染料将电子注入/接受电子进入金属氧化物/从氧化还原介体的机制将太阳光反复转化为电能。具体来说,N719([RuL2(NCS)2],L:4,4'-二羧基-2,2'-联吡啶),通过其配体（-COO-和-NCS）与TiO2表面上的氧之间的相互作用固定在TiO2上，已被用作具有高电压的常规DSSC染料。然而，-NCS配体已由于紫外线照射而从N719中的Ru2+中去除，并在电解质中与H2O或OH-交换，导致电压下降。在这项工作中,我们使用N719吸附的Eggshell（ESM）-TiO2复合材料开发了第一个DSSC，以通过ESM和N719蛋白之间的静电相互作用维持N719在TiO2上的固定。使用复合材料的DSSC即使在12小时的光照射后仍保持电压，尽管没有ESM的DSSC的电压急剧下降。这意味着ESM通过保护N719的NCS配体有助于DSSC的稳定的光伏性能。
