Sn- and Pd-Free Synthesis of D-π-A Organic Sensitizers for Dye-Sensitized Solar Cells by Cu-Catalyzed Direct Arylation
作者:Jiung-Huai Huang、Po-Han Lin、Wei-Ming Li、Kun-Mu Lee、Ching-Yuan Liu
DOI:10.1002/cssc.201700421
日期:2017.5.22
Abstract<A variety of D–π–A‐type functional organic dyes are facilely synthesized by direct C−H arylation catalyzed by inexpensive copper salts. Under optimized reaction conditions, a broad substrate scope with good functional group compatibility was demonstrated. Based on this synthetic strategy, three new dye sensitizers (CYL‐5–7) were designed and fabricated for use in dye‐sensitized solar cells (DSSCs). Photovoltaic characterization showed that these devices gave open‐circuit voltages of 0.65–0.75 V, short‐circuit currents of 5.90–12.60 mA cm−2, and fill factors of 65.6–76.9 %, corresponding to power conversion efficiencies (PCEs) of 2.95–6.20 %. This work represents the first use of Cu‐catalyzed C−H arylation for a step‐saving, Sn‐free synthesis of precursor dyes for DSSC applications.