期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 21, 期 26, 页码 9523-9531出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1jm10107b
关键词
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资金
- National Science Council of Taiwan and Academia Sinica
A new series of organic dyes containing a triarylamine donor group, a triarylene-linked bridging moiety, and a cyanoacrylic acid acceptor group were synthesized through a simple procedure in high yields. A selected set of substituents were added onto the phenyl group ortho to the cyanoacrylic acid in order to examine their influences on the performance of dye-sensitized solar cells (DSSCs). Their photochemical behaviors were examined under AM1.5 solar condition (100 mW cm(-2)). A typical device made with a compound containing a -CF3 substituent (PSP-CF3) displayed a short-circuit current (J(sc)) 15.16 mA cm(-2), an open-circuit voltage (V-oc) 0.68 V, a fill factor (ff) 0.68, corresponding to an overall conversion efficiency of 7.0% and a maximal monochromatic incident photon-to-current conversion efficiency (IPCE) 78%. Their photophysical and electrochemical properties were analyzed with the aid of a time-dependent density functional theory (TDDFT) model with the B3LYP functional. Their HOMO and LUMO energy levels are verified by both electrochemical measurements and theoretical calculations.
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