New organic dyes containing E- or Z-trifluoromethyl acrylic acid as the electron acceptors for dye-sensitized solar cell applications: an investigation of the effect of molecular configuration on the power conversion efficiency of the cells

Abstract

Two new organic dyes containing E-or Z-trifluoromethyl acrylic acid as the electron acceptors were synthesized and used as sensitizers for dye-sensitized solar cells (DSSCs). The Z-isomer achieved a power conversion efficiency (g) of 4.05%, which was much higher than that of the E-isomer (g = 1.35%). Such resultsgive a new insight into in design of new dyes for DSSCs.

Highly efficient dye-sensitized solar cells: progress and future challenges

“…78 In the case of ethylene as spacers, increasing the number of adjacent ethylenes leads to an increase of 3 and a bathochromic shi of the absorption band while a decrease in the IPCE is attributed to the dye-aggregation and photoiosmerization. 96,97 Until now, among the reported D-p-A type metal-free organic sensitizers, the highest conversion efficiencies of DSCs based on this kind of dye are about 10%. 82,[98][99][100][101][102][103] As another type of organic dye, zwitterion-based NIR organic sensitizers such as squaraine, [104][105][106][107][108][109][110][111] cyanine, [112][113][114][115][116] and related compounds 81,[117][118][119][120][121] have been also reported.…”

Structure-Specific Aerobic Defluorination of Short-Chain Fluorinated Carboxylic Acids by Activated Sludge Communities

“…Organofluorines, particularly per- and polyfluoroalkyl substances (PFAS), have caused a rapidly growing concern in public health and ecosystems. − Short-chain PFAS are synthesized as important building blocks and intermediates of biologically active compounds and functional materials. − Also, as long-chain legacy PFAS have led to increasing regulatory attention, structurally similar short-chain PFAS have been adopted as alternatives for commercial manufacturing . Meanwhile, some short-chain PFAS may be formed as the incomplete defluorination byproducts during physicochemical treatment of PFAS − and the biotransformation products of other synthetic organofluorines .…”

Chemo-, Regio-, and Stereoselective Trifluoromethylation of Styrenes via Visible Light-Driven Single-Electron Transfer (SET) and Triplet–Triplet Energy Transfer (TTET) Processes

“…The trifluoromethyl group (CF 3 ) has received increasing attention in organic synthesis because its incorporation into organic molecules often enhances lipophilicity, metabolic stability, bioavailability, and binding selectivity . Trifluoromethylated alkenes are important structural units that have been widely used in medicinal chemistry and material science . Consequently, a variety of methods have been developed for preparing these compounds (Scheme a).…”