文献类型：期刊文献

英文题名：Phenanthrene-Fused-Quinoxaline as a Key Building Block for Highly Efficient and Stable Sensitizers in Copper-Electrolyte-Based Dye-Sensitized Solar Cells

作者：Jiang, Huiyun[1,2,3];Ren, Yameng[3];Zhang, Weiwei[1,2];Wu, Yongzhen[1,2];Socie, Etienne Christophe[5];Carlsen, Brian Irving[4];Moser, Jacques-E[5];Tian, He[1,2];Zakeeruddin, Shaik Mohammed[3];Zhu, Wei-Hong[1,2];Graetzel, Michael[3]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Joint Int Res Lab Precis Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem,Inst Fine Chem,Sc, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Joint Int Res Lab Precis Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Shanghai Key Lab Funct Mat Chem,Inst Fine Chem,Sc, Shanghai 200237, Peoples R China;[3]Ecole Polytech Fed Lausanne, Lab Photon & Interfaces, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland;[4]Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photomol Sci, Lausanne, Switzerland;[5]Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Photochem Dynam Grp, Lausanne, Switzerland

年份：2020

卷号：59

期号：24

起止页码：9324

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20223112453521);WOS:【SCI-EXPANDED(收录号:WOS:000523613500001)】；

基金：Y This work was financially supported by NSFC/China (21788102, 21421004, 21905091, 21822504 and 21706070), Shanghai Municipal Science and Technology Major Project (2018SHZDZX03), Program of Introducing Talents of Discipline to Universities (B16017), Eastern Scholar (TP2016018), Science and Technology Commission of Shanghai Municipality (17ZR1407400), and China Association of Science and Technology (2017QNRC001), China Postdoctoral Science Foundation (No.2019M651418), and Fundamental Research Funds for the Central Universities (WJ1714007). H.Y.J. acknowledges China Scholarship Council (CSC) for a PhD study fellowship. M.G. acknowledges the financial support from the European Union's Horizon 2020 research and innovation program under grant agreement No. 826013. We thank Ladislav Kavan, from the J. Heyrovsky Institute of Physical Chemistry, who helped us to record the cyclic voltammograms during his time at EPFL.

语种：英文

外文关键词：Anthracene - Electrolytes - Titanium dioxide - Copper - Copper compounds - Open circuit voltage

摘要：Dye-sensitized solar cells (DSSCs) based on Cu-II/I bipyridyl or phenanthroline complexes as redox shuttles have achieved very high open-circuit voltages (V-OC, more than 1 V). However, their short-circuit photocurrent density (J(SC)) has remained modest. Increasing the J(SC) is expected to extend the spectral response of sensitizers to the red or NIR region while maintaining efficient electron injection in the mesoscopic TiO2 film and fast regeneration by the Cu-I complex. Herein, we report two new D-A-pi-A-featured sensitizers termed HY63 and HY64, which employ benzothiadiazole (BT) or phenanthrene-fused-quinoxaline (PFQ), respectively, as the auxiliary electron-withdrawing acceptor moiety. Despite their very similar energy levels and absorption onsets, HY64-based DSSCs outperform their HY63 counterparts, achieving a power conversion efficiency (PCE) of 12.5 %. PFQ is superior to BT in reducing charge recombination resulting in the near-quantitative collection of photogenerated charge carriers.