Michael Grätzel Center for Mesoscopic Solar Cells, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan, PR China.
ChemSusChem. 2012 Jan 9;5(1):181-7. doi: 10.1002/cssc.201100549. Epub 2012 Jan 2.
The use of mixed self-assembled monolayers, combining hydrophobic co-adsorbents with the sensitizer, has been demonstrated to enhance the efficiency of dye-sensitized solar cells (DSCs). Herein, the influence of the anchoring groups of the co-adsorbents on the performance of the DSCs is carefully examined by selecting two model molecules: neohexyl phosphonic acid (NHOOP) and bis-(3,3-dimethyl-butyl)-phosphinic acid (DINHOP). The effect of these co-adsorbents on the photovoltaic performance (J-V curves, incident photon-to-electron conversion efficiency) is investigated. Photoelectron spectroscopy and electrochemical impedance spectroscopy are performed to assess the spatial configuration of adsorbed dye and co-adsorbent molecules. The photoelectron spectroscopy studies indicate that the ligands of the ruthenium complex, containing thiophene groups, point out away from the surface of TiO(2) in comparison with the NCS group.
使用混合自组装单分子层，将疏水性共吸附剂与敏化剂结合使用，已被证明可以提高染料敏化太阳能电池（DSC）的效率。在此，通过选择两种模型分子：新己基膦酸（NHOOP）和双（3,3-二甲基丁基）膦酸（DINHOP），仔细研究了共吸附剂的锚固基团对 DSC 性能的影响。研究了这些共吸附剂对光伏性能（J-V 曲线、入射光子-电子转换效率）的影响。进行光电电子能谱和电化学阻抗谱以评估吸附染料和共吸附剂分子的空间构型。光电电子能谱研究表明，与 NCS 基团相比，含噻吩基团的钌配合物的配体从 TiO(2)表面指向外面。
