Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, China.
Laboratoire de Photoniques et Interfaces, Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne , Station 6, 1015 Lausanne, Switzerland.
J Am Chem Soc. 2016 Aug 31;138(34):10742-5. doi: 10.1021/jacs.6b05281. Epub 2016 Aug 19.
Dye-sensitized solar cells (DSSCs) have shown significant potential for indoor and building-integrated photovoltaic applications. Herein we present three new D-A-π-A organic sensitizers, XY1, XY2, and XY3, that exhibit high molar extinction coefficients and a broad absorption range. Molecular modifications of these dyes, featuring a benzothiadiazole (BTZ) auxiliary acceptor, were achieved by introducing a thiophene heterocycle as well as by shifting the position of BTZ on the conjugated bridge. The ensuing high molar absorption coefficients enabled the fabrication of highly efficient thin-film solid-state DSSCs with only 1.3 μm mesoporous TiO2 layer. XY2 with a molar extinction coefficient of 6.66 × 10(4) M(-1) cm(-1) at 578 nm led to the best photovoltaic performance of 7.51%.
染料敏化太阳能电池（DSSCs）在室内和建筑集成光伏应用方面显示出了巨大的潜力。本文介绍了三种新型 D-A-π-A 有机敏化剂 XY1、XY2 和 XY3，它们具有高摩尔消光系数和宽吸收范围。通过在共轭桥引入噻吩杂环以及改变 BTZ 在共轭桥上的位置，对这些染料进行了分子修饰，使其成为辅助受体。由此产生的高摩尔消光系数使得仅使用 1.3μm 介孔 TiO2 层即可制备高效的薄膜固态 DSSCs。摩尔消光系数为 578nm 时为 6.66×10(4)M(-1)cm(-1)的 XY2 导致了最佳的光电性能，为 7.51%。
