Dithiafulvenyl unit as a new donor for high-efficiency dye-sensitized solar cells: Synthesis and demonstration of a family of metal-free organic sensitizers.
writer：K. P. Guo, K. Y. Yan, X. Q. Lu, Y. C. Qiu, Z. K. Liu, J. W. Sun, F. Yan, W. Y. Guo, S. H. Yang.
keywords：Dithiafulvenyl uni,dye-sensitized solar cells
source：期刊
specific source：Org. Lett.
Issue time：2012年
This work identifies the dithiafulvenyl unit as an excellent electron donor for constructing D?π–A-type metal-free organic sensitizers of dye-sensitized solar cells (DSCs). Synthesized and tested are three sensitizers all with this donor and a cyanoacrylic acid acceptor but differing in the phenyl (DTF-C1), biphenyl (DTF-C2), and phenyl–thiopheneyl–phenyl π-bridges (DTF-C3). Devices based on these dyes exhibit a dramatically improved performance with the increasing π-bridge length, culminating with DTF-C3 in η = 8.29% under standard global AM 1.5 illumination.